Premium Dome Washer for 20mm Tube

Professional Spa Sealing Solution

As a retailer of hot tub spa parts, I’m offering these specialized dome washers designed specifically for 20mm tube connections in spa and hot tub plumbing systems.

Product Overview

These precision-engineered dome washers are designed to create a watertight seal on 20mm tube connections. Each washer features a domed profile that ensures optimal compression and superior sealing properties under various operating conditions.

Applications

• Pump connections
• Heater unions
• Filter connections
• Main plumbing joints
• Manifold systems
• Union fittings
• Valve assemblies

Key Features

• Precision-engineered dome profile
• Professional-grade material
• Enhanced sealing capability
• Compression-optimized design
• Chemical resistant construction
• Heat-resistant properties
• Uniform sealing pressure

Technical Specifications

Specification	Detail
Tube Size Compatibility	20mm
Material	High-Grade EPDM
Style	Domed Profile
Quantity	Pack of 10
Temperature Range	-10°C to 85°C
Chemical Resistance	Excellent
Compression Set	Low
Color	Black
Hardness	70 Shore A
Pressure Rating	Up to 4 bar

Installation Guidelines

Place the dome washer with the curved surface facing the fitting’s sealing face. Ensure the sealing surface is clean and free from debris before installation. Hand-tighten union nuts initially, then use appropriate tools for final tightening.

Performance Advantages

The domed design provides superior sealing compared to flat washers, helping prevent leaks even under varying pressure conditions. The precise engineering ensures consistent compression and reliable sealing.

System Compatibility

Designed to work with standard 20mm spa plumbing components and fittings. Compatible with most major spa and hot tub manufacturers’ union fittings and connections.

Quality Standards

Manufactured from high-grade materials specifically chosen for hot tub and spa environments. Each batch undergoes quality control checks to ensure consistent performance and reliability.

Maintenance Notes

Regular inspection recommended during routine maintenance. Replace washers showing signs of compression set, hardening, or degradation to maintain optimal system performance