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Mini Ball Valves

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Imperial & Metric Sizes

These sizing may be helpful to those who are unfamiliar with the different descriptions of metric and imperial sizes when specifying pipes or fittings. Imperial sizes for pipe fittings and other components are made to the normal size of the pipe bore in inches and fractions of an inch. Metric Systems are specified by the outside diameter of a pipe expressed in millimetres.

Imperial Metric Sizes
Normal Bore | Pipe Outside Dia. Pipe Outside Dia. | Normal Bore
3/8" | 17.1 16 | 10
1/2" | 21.4 20 | 15
3/4" | 26.7 25 | 20
1" | 33.6 32 | 25
One and 1/4" | 42.2 40 | 32
One and 1/2" | 48.3/td> 50 | 40
2" | 60.3 63 | 50
Two and 1/2" | 75.2 75 | 65
3" | 88.9 90 | 80
4" | 114.3 110 | 100
5" | 140.2/td> 140 | 125
6" | 168.3 160 | 150
8" | 219.1 225 | 200

What our Customers have to say about us...

Phil Walsh

“Excellent company to do business with, very friendly and professional staff. Anchor Plastics always have good stock levels and have been one of our key suppliers for many years and long may it continue.”

Mick Arben

I have been dealing with Anchor Industrial Plastics Ltd for over twenty years, the reason its been this long is simple – they have the parts on the shelf unlike some of my other suppliers who can keep me waiting for days. I can call in to the trade counter where there is always a […]

Kim Knowles

We have been working with Anchor Plastics for many years, and it’s pleasure to do business with them. They have great knowledge on all products and are able to offer products from very vague descriptions, their turn around on quotations is excellent as this helps with the speed of purchase orders being raised for our […]

Adrian While

I am pleased to advise that the service we receive from you is always prompt, courteous and efficient.

Mervyn Cottey

Anchor Industrial Plastics has supplied us with plastic pipework for over 20 years. During that time, they have provided us with a first class service. Deliveries have been totally reliable and tracked by Anchor. Their product range is extensive and well-priced. They provide an all-round efficient and friendly service, which we highly recommend.

Richard Thorneycroft

The nature of our core business requires us to be able to respond very quickly to urgent situations and everyone at Anchor Plastics has always gone out of their way to help. No requirement is ever considered to be too small or too big and even out of hours collections are made easy for our […]

Billy Whitaker

We’ve have been dealing with Anchor Plastics for over 25 years, and the relationship has been professional throughout. We hope that our relationship builds on its existing success and continues long into the future. We have always focused on putting our customers at the heart of everything we do, Anchor Plastics also take this stance […]

Wras Approved Supplier Plastic Products Anchor Plastics
Bsi Kitemark Accreditation
Effast PolyPipe Logo Stockist

Based in Ripley, Derbyshire, we've been supplying Industrial Plastics & pipework to the trade for over 25 years

Registered Office Address:
Unit 3-4 Benjamin Outram Business Centre,
Whiteley Rd, Ripley, Derbyshire, DE5 3QL