Whats the minimum pressure I can set this to?

I don’t know. But I found mine was leaking just a few weeks after fitting it. Fortunately it’s only on the end of a pipe in the garage after a tap, so only drips while that tap is on. I should have tried to return it really.

What diameter thread are the inlet and outlet?

Hi, It takes 15mm DIA round Copper Pipe ...I expect the Threads are 15mm BSP thread ...

Can this be used with air ?

My guess would be no ,I believe it is specific to water

what is the size of the o-ring

If by the O Ring you mean the Olive then the answer is 15 mm

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15mm Adjustable Pressure Reducing Valve Including Gauge 1-6 Bar Reliance Water Controls

Product ID: 48146643

Details

Brand
Predator
Exterior finish
Stainless
Inlet connection size
15 Millimeters
Inlet connection type
Compression
Item dimensions L x W x H
14 x 8 x 11
Material
Metal

💧WRAS approved for drinking water

📊Integrated pressure gauge included

⚙️Adjustable 1-6 bar pressure range

€ 72.48

Duties & taxes included

In stock

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Description

💧 Master your water pressure like a pro—because your system deserves precision.

REAL TIME MONITORING - Built-in pressure gauge lets you track performance at a glance—no guesswork needed.
COMPACT DURABLE DESIGN - Stainless steel finish fits seamlessly into any setup while resisting corrosion.
PRECISION PRESSURE CONTROL - Easily dial your ideal water pressure from 1 to 6 bar for ultimate system protection.
CERTIFIED QUALITY ASSURANCE - WRAS and BSEN 1567 standards ensure safe, reliable operation you can trust.
VERSATILE TEMPERATURE COMPATIBILITY - Engineered for both hot and cold drinking water applications up to 80°C.

The Predator 15mm Adjustable Pressure Reducing Valve by Reliance Water Controls offers precise pressure regulation from 1 to 6 bar, complete with an integrated pressure gauge. Designed for hot and cold drinking water systems, it features a compact stainless steel build, meets WRAS and BSEN 1567 certifications, and supports maximum temperatures up to 80°C, making it ideal for residential, commercial, and industrial use.

Specifications

ASIN	B00T6J63UC
Best Sellers Rank	9,788 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 16 in Pressure & Vacuum Measurement 17 in Plumbing Testing Equipment 40 in Valves (DIY & Tools)
Brand	Predator
Country of Origin	United Kingdom
Customer Reviews	4.6 4.6 out of 5 stars (105)
Exterior Finish	Stainless Steel
Inlet Connection Size	15 Millimeters
Inlet Connection Type	Compression
Item Dimensions	14 x 8 x 11 centimetres
Item Weight	0.4 Kilograms
Manufacturer	Reliance Water Controls
Material	Metal
Maximum Pressure	6 Bars
Model Number	Predator PRV 15mm
Number of Items	1
Number of Packs	1
Number of Ports	2
Outlet Connection Size	15 Millimeters
Outlet Connection Type	BSPT
Part Number	PRED 800 015
Size	15mm
Specification Met	WRAS, BSEN 1567
Thread Size	15mm
UPC	708747445442
Unit Count	1.0 count
Valve Type	pressure regulator

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