Description

This 1” Inch x 1” Inch Double Check Valve is made from high-quality DZR (Dezincification Resistant) brass and features a female x female threaded connection for easy integration into standard plumbing systems. It is specifically designed to protect against backflow contamination in potable water supplies and is fully compliant with UK Water Regulation 4 and WRAS approval standards.

Double check valves are used to prevent reverse flow from contaminating clean water sources, making them essential for a wide range of residential and commercial plumbing applications. The DZR brass body ensures long-term durability and corrosion resistance, especially in aggressive water conditions.

This fitting is ideal for use in water supply systems where a medium hazard backflow protection is required — such as in homes, hotels, offices, and light commercial premises. Its compact design makes it suitable for installation in tight spaces or service boxes where larger valves may not fit.

Key Features

• WRAS Approved: Certified for use in drinking water systems throughout the UK

• Material: DZR brass for superior corrosion resistance

• Design: Double check valve with female x female BSP threading

• Regulation 4 Compliant: Meets UK legal standards for plumbing fittings

• Backflow Protection: Prevents contamination of clean water supplies

Specifications

• Size: 1” Inch x 1” Inch

• Material: DZR Brass

• Connection Type: Female x Female BSP

• Standard: WRAS & UK Water Regulation 4

• Colour: Brass

Applications

• Domestic water supply systems

• Commercial plumbing installations

• Irrigation and external taps

• Service boxes and meter installations

• Anywhere medium-risk backflow prevention is required

Why Choose Stanley John LTD

Based in Newbury, Berkshire, Stanley John LTD supplies reliable water fittings to professionals and households across Berkshire, Hampshire, Wiltshire, Oxfordshire, Surrey, Greater London and beyond. We pride ourselves on dependable stock, trusted quality, and expert product knowledge. Explore more fittings in our Brass Taps & Fittings range to complete your installation with confidence.

Order the 1” Inch x 1” Inch Double Check Valve DZR (Female x Female) today for WRAS-approved backflow protection in potable water systems. Fast delivery from Stanley John LTD.