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Its difficult to find a suitable tap/valve/shutoff for water butts.

This is also made worse by most tap/valves not having a backing flange which allows proper sealing up against the water butt.

What is the correct name for this fitting with the flange?

The threads are usually labelled 1/2" BSP, 3/4" BSP, 1" BSP

The following picture contains a fitting without a flange, its not suitable as you have no backing to create a seal.

wrong fitting

These following pictures contain the correct fitting, but what is the name of this?

enter image description here enter image description here

DAVID
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  • Probably "flanged shutoff valve" but I can't easily verify that that gets suitable results in your local area. Given BSP threads, it's not the same as mine. "Bulkhead shutoff valve" might be an alternative, as the flanged screw gasket-sealed connection (without always being associated with a valve) is a "bulkhead fitting." – Ecnerwal Aug 28 '23 at 18:33

1 Answers1

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A fitting with a flange that can seat against a wall is a 'bulkhead fitting'. This is the first result I got when I searched for 'bulkhead fitting valve'.

PVC quarter turn valve with bulkhead fitting

As an aside, I very much recommend springing for a brass bulkhead fitting.

MackM
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