Product Overview

Our pressure washer water seal is a soft rubber auxiliary seal professionally manufactured for household and light-duty commercial high-pressure cleaning machines, made of high-quality NBR (Nitrile Butadiene Rubber) material. Featuring excellent elasticity, soft texture, outstanding leak-proof performance and shock absorption, these seals serve as core secondary sealing parts for cleaning pump plunger assemblies. They are perfectly compatible with clean water and neutral detergents, delivering stable and long-lasting sealing performance in daily low-pressure cleaning working conditions.

Also known as Bonded Seal, Dowty Washer, Sealing Washer, Pump Gland Seal, Rubber-to-Metal Washer, or Service Seal, this versatile component is widely used in pressure washer pump assemblies and is a standard replacement part for most household and light-duty cleaning equipment. We stock a complete range of standard sizes, covering common specifications for mainstream pressure washer pumps. All sizes are in sufficient stock for wholesale and small-batch customized orders, fully meeting the replacement and maintenance needs of various light cleaning equipment.

Core Product Advantages

Premium NBR Rubber Material: This pressure washer water seal is made of high-elastic nitrile rubber raw material, soft and flexible, not easy to deform, with excellent water resistance and moderate detergent corrosion resistance, suitable for long-term cyclic use of cleaning pumps.
Professional Secondary Sealing Design: Specially developed for low-pressure auxiliary sealing of cleaning machine pumps, it effectively buffers water pressure impact, prevents liquid leakage, and reduces pump operation noise.
Full Standard Size Coverage: Covers all mainstream conventional sizes for small pressure washers, compatible with most household car washers, portable cleaning pumps and light commercial cleaning equipment.
Factory Direct Supply: Strictly produced in accordance with industrial standards, uniform precision size, stable quality, cost-effective wholesale price, supporting OEM customization and bulk spot supply.

Complete Standard Size Range (In Stock)

We provide a full series of soft NBR rubber pressure washer water seals, including the following complete conventional sizes (ID × OD × T):

12mm series: 12×17×3mm / 12×17×4.5mm / 12×18×5mm / 12×18×5.2mm
12-14mm series: 12×20×5mm / 12×20×5.2mm / 12×20×5.3mm / 13×20×4mm
14-15mm series: 14×19×4mm / 14×21×5.5mm / 14×22×5.5mm / 15×22×5.5mm / 15×24×5mm
16-18mm series: 16×23×5.5mm / 18×24×4.5mm / 18×24×5mm / 18×25×5.5mm / 18×26×5mm / 18×26×6mm
20mm series: 20×27×5mm / 20×27×5.5mm / 20×30×5mm / 20×30×8.3mm
22-28mm series: 22×29×5mm / 25×32×5mm / 28×36×5.5mm

Need a size not listed above? We support custom manufacturing based on your drawings and samples.

Application Scope

This pressure washer water seal is widely used in:

Household portable pressure washers
Small commercial car washing machines
Light-duty industrial cleaning pumps
Low-pressure cleaning equipment

As auxiliary sealing accessories for pump core plungers, they are ideal replacement parts for daily equipment maintenance and repair, with strong versatility and wide compatibility. Whether you are looking for a Bonded Seal, Dowty Washer, Pump Gland Seal, or standard water pump seal, this product delivers reliable performance across multiple applications.

Quality & Standards

Our pressure washer water seals are manufactured in compliance with ISO 9001 quality management standards and meet international industrial requirements for sealing components. Each seal undergoes strict dimensional inspection and material testing before shipment to ensure consistent quality and reliable performance.

Frequently Asked Questions

Q: What is the temperature range of this water seal?
A: The operating temperature range is -20°C to 100°C, suitable for most household and light-duty cleaning applications.

Q: Is this the same as a Bonded Seal or Dowty Washer?
A: Yes, this product is commonly referred to as a Bonded Seal, Dowty Washer, Sealing Washer, Pump Gland Seal, or Rubber-to-Metal Washer in the industry. It serves the same function of creating a watertight seal between pump components and is a direct replacement for most standard pressure washer seals.

Q: Is this seal compatible with detergents?
A: Yes, NBR rubber is compatible with clean water and neutral detergents. For strong chemicals, please contact us for alternative material recommendations.

Q: How long does delivery take?
A: Standard sizes are in stock and ship within 1-3 business days. Custom sizes require 7-15 days.

Q: Do you offer wholesale pricing?
A: Yes, we offer competitive wholesale prices for bulk orders. Please contact us for a quote.

Related Products

Explore our complete range of sealing solutions for pressure washers and cleaning equipment:

Custom Service

In addition to the complete standard sizes in stock, we also support non-standard size customization according to customer drawings and samples. Whether it is special inner diameter, outer diameter or thickness specifications, we can customize production to meet the personalized sealing needs of different cleaning equipment models.

Contact us today to get the best factory-direct price and free technical consultation.

Soft Rubber Auxiliary Water Seals

Soft NBR Rubber Auxiliary Water Seal for Pressure Washer