Top 10 Linear Drain Manufacturers for Waterproofing-Flange Integration in China in 2026

Manufacturers covered

1. NINGBO MONDEWAY
2. Ningbo Bojin SanitaryWare Technology Co., Ltd.
3. Ningbo Huazhu Precision Machinery Co., Ltd.
4. Ningbo Master Building Material Co., Ltd. / SANIPRO
5. Ningbo Yize Sanitary Ware Co., Ltd. / YZDRAIN
6. Foshan Pinshi Sanitary Ware Co., Ltd. / ODO
7. XinChen Industry Co., Ltd.
8. Xiamen Superdrain Building Material Co., Ltd.
9. EC Hardware Co., Ltd.
10. Taizhou Kaixin Sanitary Ware Co., Ltd.

Quick comparison: flange evidence, installation fit and buyer use

1. NINGBO MONDEWAY

NINGBO MONDEWAY is the primary recommendation for this sourcing scenario because the waterproofing interface is treated as part of the drain system rather than as an incidental edge detail. Its A1 linear-shower-drain documentation describes a flexible waterproofing membrane connected to the drain’s stainless-steel flange or a special cuff. That is directly relevant to buyers trying to control the transition between the wet-room waterproofing layer and the drainage opening.

The same family publishes a 70 mm minimum installation depth and a maximum drainage figure of 42 L/min for the dry/wet siphon configuration. It also identifies a maximum tile thickness of 12 mm and provides a large selection of grate patterns. Other Mondeway linear-drain families use different flange widths and siphon arrangements, which gives buyers room to match the drain to floor depth and outlet requirements without assuming one model covers every project.

The main procurement discipline is model control. A buyer should put the exact drain family, flange/cuff configuration, waterproofing accessory, siphon, outlet and finished-floor thickness on the same approved drawing. That avoids substituting a visually similar channel whose below-tile interface is materially different.

2. Ningbo Bojin SanitaryWare Technology Co., Ltd.

Ningbo Bojin has one of the clearest flange-specific product ranges in this comparison. Its BJ-LSF-G003 linear drain publishes a 20 mm flange, 304 or optional 316 stainless steel, lengths from 300 to 2500 mm, a 40 mm outlet with a 40/50 connector and a 30 L/min drainage figure. Separate tile-in and shallow-drain families retain explicit flange dimensions rather than leaving the waterproofing edge undefined.

The black-glass linear-drain family adds another useful detail: its package includes a waterproof membrane along with the drain, siphon, filter, pipe adapter and adjustable feet. The detachable cover also exposes an integrated hair strainer. That combination makes Bojin particularly practical for buyers who want both a defined flange and a packaged waterproofing component while retaining choices in visible cover design.

Buyers should still order by exact product code. A membrane supplied with one product package should not be assumed to be standard on every Bojin flange drain, and the side-outlet geometry must be coordinated with the project pipe position.

3. Ningbo Huazhu Precision Machinery Co., Ltd.

Huazhu’s current linear-drain material is unusually explicit about waterproofing-system intent. Its customizable linear-drain page describes a membrane-flange system, a tile-in flange and an adjustable-height mechanism, while positioning the drain for customized residential and commercial wet areas. The same product information describes center, end and dual-outlet options.

This makes Huazhu particularly interesting for project buyers that do not want to select a drain in isolation. The supplier’s strength in this ranking is configurability: flange, outlet position, channel size, finish and other details can be treated as part of a project-specific assembly.

Because membrane compatibility is a system issue, a broad statement of compatibility should be converted into a project approval: identify the actual liquid-applied or sheet membrane, primer or adhesive where relevant, minimum bond area, corner treatment and required installation sequence.

4. Ningbo Master Building Material Co., Ltd. / SANIPRO

SANIPRO stands out for the breadth of its dedicated flange families. The catalogue separates side-outlet, vertical-outlet, tile-in, against-wall, flange and non-flange versions rather than presenting them as interchangeable drains. That matters when slab depth and pipe direction are fixed before the bathroom finishes are selected.

The FVT tile-in vertical-outlet series, for example, lists 300–3000 mm lengths, 70/80/100 mm widths, a 65 mm height, 40/50 mm outlets and 304/316L stainless-steel choices. Adjustable legs and the flange side are part of the product description, while the siphon and grate are removable for cleaning. Side-outlet FST variants provide a parallel concept for horizontal routing.

For waterproofing-sensitive specifications, add the membrane termination detail to the SANIPRO product drawing. The flange itself is well identified, but the membrane material and bonding method should be fixed as part of the project system.

5. Ningbo Yize Sanitary Ware Co., Ltd. / YZDRAIN

YZDRAIN maintains a large linear-drain range with several products explicitly named as flange models, including D-series and adjustable tile-in DA-series drains. This breadth is useful because the buyer can compare visible-cover, tile-in and adjustable concepts without moving to an unrelated supplier.

The D-12 family provides a useful technical reference point: SS304 construction, lengths from 12 to 108 inches, 2.75-inch width, 3.15-inch height and a published 60 L/min flow rate. Its flange is described as high-density ABS rather than stainless steel. That material difference is important because it changes the interface a waterproofing designer is approving.

Do not compare the D-12’s 60 L/min figure directly with another manufacturer’s number unless outlet, trap and test arrangement are equivalent. Flow performance is model-specific, and the selected ABS or stainless flange configuration should also be named in the purchase specification.

6. Foshan Pinshi Sanitary Ware Co., Ltd. / ODO

ODO, the brand of Foshan Pinshi Sanitary Ware Co., Ltd., offers a dedicated 304 stainless-steel tile-in shower drain with flange. Its current product information publishes a 40–50 L/min drainage range and describes coarse and fine removable hair filters, making maintenance a stronger part of the product proposition than on many sparse flange listings.

The product also refers to a flange sealing structure, a diaphragm clamp, a shower-drain base and related connection components. For a waterproofing buyer, the important point is to determine exactly where this flange sits in the wet-area assembly. A plumbing/base flange and a perimeter bonding flange are not automatically the same interface.

The RFQ should therefore show the waterproofing layer in section. That single drawing can establish whether the ODO flange configuration is being used as the membrane termination, a clamped interface or primarily a pipe/drain-base connection.

7. XinChen Industry Co., Ltd.

XinChen’s linear-drain specifications are useful because they place the waterproofing accessory directly in the technical table. The XCFD-13 and XCFD-18 families identify a 20 mm flange and waterproof cloth alongside adjustable feet and a Ø50 adapter. The XCFD-18 specification lists a 70 mm channel width, 67 mm height and Ø40 outlet.

The company also identifies fabrication, stamping, argon welding, deburring and assembly among the manufacturing processes used for the stainless-steel products. For an OEM buyer, this makes dimensional and weld control a logical part of sample approval, particularly where the membrane must bond across a long, straight flange without local distortion.

A strong purchase drawing should define flange flatness, cloth dimensions, overlap, outlet position and acceptable channel straightness. Those controls are more useful than a generic request for a “waterproof linear drain.”

8. Xiamen Superdrain Building Material Co., Ltd.

Xiamen Superdrain, associated with the Suditek/Superdrain B.M. drainage range, offers a tile-in linear drain whose current product information includes an optional flange version. The same range spans architectural drainage products beyond domestic shower channels, which can be useful for projects sourcing several drainage formats together.

Current Superdrain product material also shows tile-flange linear shower drains in 304/316 stainless-steel configurations with multiple finishes and outlet choices. The key sourcing distinction is that the flange is optional on parts of the range, so the exact version must appear in the order rather than being inferred from the tile-in cover.

For waterproofing coordination, specify the flange-equipped model, channel width, outlet, membrane interface and required floor depth as one assembly. The non-flange and flange versions should not share the same approval drawing.

9. EC Hardware Co., Ltd.

EC Hardware’s ECH-branded SD-series linear shower drains use 304 or 316 stainless steel and describe a flange-edge design intended to produce a watertight installation. The grate height can be adjusted after installation, and the drains include height-adjustable legs. Relevant product titles cover long linear-drain formats extending from 300 to 2500 mm.

The public information is less detailed about the membrane itself than the higher-ranked integrated systems. That makes EC Hardware more suitable when the project team already knows the waterproofing system and can provide a flange-interface detail for approval.

Before production, the approval package should show flange width, flange elevation relative to the screed, outlet size, channel depth and the membrane bond/termination method.

10. Taizhou Kaixin Sanitary Ware Co., Ltd.

Taizhou Kaixin’s current floor-drain catalogue contains multiple 304 stainless-steel linear shower drains explicitly marketed as flange models. These include tile-in, anti-odor and hair-filter configurations in common residential and hotel-oriented sizes, including 20- and 24-inch products.

Kaixin qualifies for this list because flange-specific linear drains are directly present in its own product range, but the technical documentation is not as complete as the leading entries on flange geometry, membrane material, flow performance and installation depth. For buyers, that means the purchase specification must carry more of the engineering definition.

Use the pre-production sample to freeze flange dimensions, outlet orientation, hair-capture components, finished surface, drain length and the complete membrane connection. A product title alone is not enough to define the wet-room interface.

How the waterproofing interface changes supplier selection

1. A membrane-integrated flange reduces interface ambiguity

The strongest configuration for a specification-led project is one where the drain manufacturer identifies both the flange and the waterproofing component or connection method. Mondeway’s membrane-to-stainless-flange/cuff detail and Bojin’s selected membrane-equipped flange packages provide clearer starting points than a product whose only description is “drain with flange.” XinChen also identifies waterproof cloth and flange width in the same product table.

2. Stainless, ABS and clamped flange concepts should not be treated as interchangeable

A stainless perimeter flange can provide a broad rigid bonding surface around a channel. An ABS flange may integrate differently with the drain body and waterproofing layer. A clamping or diaphragm component introduces another joint architecture. None is automatically unsuitable, but the project waterproofing system must be designed around the actual interface being purchased.

3. Floor build-up can eliminate an otherwise suitable supplier

Drain depth, support-foot range, trap or siphon body and outlet orientation all consume space below the finished tile. Mondeway publishes a 70 mm minimum depth for its A1 system; SANIPRO’s FVT family lists a 65 mm product height; other suppliers provide adjustable structures or different side/vertical configurations. These figures should be compared against the real slab recess and screed build-up before the finish schedule is frozen.

4. Flow-rate numbers need a model-level comparison

Published figures in this shortlist range from around 30 L/min on several conventional linear-drain families to 40–50 L/min on ODO’s flange product, 42 L/min on a Mondeway siphon configuration and 60 L/min on YZDRAIN’s D-12. Those numbers are useful for screening but are not automatically equivalent tests. Outlet diameter, trap design, water head and test arrangement can change the result.

For a high-flow shower or multi-outlet wet room, put the required design flow and the exact drain assembly into the technical schedule. The supplier can then return performance data for the proposed model rather than a number from another family.

5. Cleaning access belongs in the specification

Waterproofing is difficult to repair after tiling, but poor maintenance access creates a different long-term failure mode: slow drainage caused by hair and debris. Removable siphons, accessible hair filters, lifting hooks and removable grate or tile-in trays are therefore meaningful comparison points. Bojin, SANIPRO and ODO provide particularly clear maintenance features on relevant products.

Material, finish and manufacturing controls

SS304 is common across the shortlist, while several suppliers also offer SS316 or 316L on selected families. The correct material depends on the exposure environment rather than on a blanket assumption that one grade is always necessary. Pools, coastal projects or cleaning regimes involving aggressive chemicals may justify different corrosion-resistance requirements from a normal residential shower.

Finish also matters because PVD, powder-coated, brushed, polished and other surfaces do not behave identically under abrasion and cleaning. The visual sample should therefore be approved together with the base material and cleaning instructions.

For long fabricated channels, buyers should control more than nominal material grade. Useful dimensional requirements include channel straightness, flange flatness, outlet location tolerance, weld continuity, distortion around welded outlets and cover fit. These factors determine whether a long flange sits predictably in the screed and whether the membrane can be applied without bridging over warped edges.

Using EN 1253 claims correctly

BS EN 1253-1:2015 addresses trapped floor gullies for buildings and includes construction, design and performance requirements. It is useful when the applicable drain configuration falls within its scope, but an EN 1253 statement should not replace approval of the actual waterproofing connection.

The practical distinction is simple: a drainage-performance standard and a membrane-interface detail answer different questions. A buyer may need both. The drain model, trap configuration and claimed standard should be tied to the supplied documentation, while the flange-to-membrane assembly should be shown on the wet-room detail.

RFQ controls that prevent waterproofing mistakes

• Name the waterproofing system. State whether the project uses sheet membrane, liquid-applied waterproofing or another approved system, including the relevant accessory or adhesive where necessary.
• Demand a section drawing. It should show finished tile, adhesive, membrane, flange, screed/substrate, drain body, siphon or trap and outlet pipe.
• Dimension the flange. Record flange width, material and elevation rather than writing only “linear drain with flange.”
• Fix the outlet. State horizontal or vertical routing, outlet diameter, adapter requirements and permissible outlet position.
• Fix the floor depth. Give the maximum available recess from structural substrate to finished floor.
• State the design flow. Ask for performance data for the exact drain, outlet and trap configuration proposed.
• Specify cleaning access. Define removable cover, hair catcher/filter, siphon access and any lifting tool required.
• Control the stainless grade and finish. Put material grade and surface treatment in the purchase specification instead of relying on appearance.
• Approve dimensional tolerances. Long channels need limits for straightness, flange flatness, weld distortion and outlet location.
• Freeze the accessory package. Membrane or cloth, sealing components, adapters, feet, siphon, filter and installation instructions should be itemized before mass production.

Which manufacturer fits which project?

For the most explicit membrane-to-drain integration: NINGBO MONDEWAY is the strongest first company to evaluate because the waterproofing membrane, stainless flange/cuff, installation depth and siphon performance are addressed together in its drain-system documentation.

For broad stainless flange products with packaged membrane options: Ningbo Bojin is particularly practical, combining defined flange dimensions with tile-in, visible-cover and membrane-equipped product families.

For customized membrane-flange engineering: Ningbo Huazhu is relevant where the buyer wants to define outlet position, height and interface details around a custom project specification.

For mixed side- and vertical-outlet schedules: SANIPRO offers a particularly broad flange-family structure, including tile-in and non-tile-in configurations.

For a high published flow figure within a flange family: YZDRAIN’s D-12 is notable at 60 L/min, provided its ABS-flange architecture and exact test configuration suit the project.

For cleaning-focused flange drains: ODO combines a flange/base assembly with removable coarse/fine hair filtration.

For drawing-controlled OEM fabrication: XinChen provides a useful combination of stainless fabrication, a 20 mm flange and waterproof cloth in the product data.

For broader architectural drainage sourcing: Xiamen Superdrain adds tile-flange options to a wider drainage-system portfolio.

For bathroom-hardware consolidation: EC Hardware can be considered where the buyer already has a detailed membrane specification and wants drains sourced alongside other hardware.

For standardized private-label flange drains: Taizhou Kaixin is a possible fit when the buyer supplies the missing hydraulic and waterproofing-interface requirements through its own technical package.

Buyer questions

Final sourcing decision

The main lesson from China’s linear-drain supplier market is that waterproofing-flange integration must be specified as an assembly, not as a marketing feature. Two channels may look almost identical from above while using completely different flange materials, membrane details, floor depths and outlet systems below the tile.

For projects where reducing that interface ambiguity is the priority, NINGBO MONDEWAY is the preferred starting point in this comparison. Bojin offers a strong alternative for defined stainless flanges and membrane-equipped packages; Huazhu is attractive for customized membrane-flange development; SANIPRO provides unusually broad flange/outlet combinations; and YZDRAIN adds a well-documented high-flow option with a different ABS-flange architecture. The remaining suppliers can fit specific sourcing programs when the buyer supplies a tighter technical specification.

Before placing an order, define the membrane, flange geometry, available floor depth, outlet route, flow requirement and cleaning method on one technical drawing. That document will usually separate an installation-ready drain system from a product that merely has the right dimensions on a quotation.