Stop Cocks

A stop cock is used to control the flow of mains water in both residential and commercial buildings. It is important to know that if you are unfortunate enough to have a burst pipe or broken tap water pouring everywhere causing damage where your stop cock is to halt the water. Generally speaking there is usually an internal and external stop cock in more homes.
External Stop cock
An external valve controls the flow from the water mains serving the street into your house. If this supply develops a leak, then the external stop cock needs shutting off to allow for repairs.
Internal Stop cock
An internal stop cock turns off the water from the supply pipe that enters your property, and can be located in various places.
The stop cock looks like a tap, but without an outlet spout. It's placed between two lengths of pipes, acting as a connector. This allows the stop cock to control the flow of water with the twist of the tap.

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Description Price Connection 1 Connection 2 Body Material Handle Type Handle Material For Use With Operating Pressure Connection Gender 1 Connection Gender 2 Pipe Size 1 Pipe Size 2 Thread Standard or Connection Type 1 Thread Standard or Connection Type 2 Operating Temperature Range
RS Stock No. 199-2332
Mfr. Part No.15STV/2
BrandJohn Guest
£8.04
Each
Units
15 mm Push Fit Female 15 mm Push Fit Female Acetal Knob - Cold Water, Hot Water 12 bar, 6 bar Female Female 15mm 15mm - Push Fit -
RS Stock No. 199-2348
Mfr. Part No.22STV
BrandJohn Guest
£12.14
Each
Units
22 mm Push Fit Female 22 mm Push Fit Female Acetal Knob - Cold Water, Hot Water 12 bar, 6 bar Female Female 22mm 22mm - Push Fit -
RS Stock No. 761-238
Mfr. Part No.501009
£36.09
Each
Units
28 mm Compression 28 mm Compression Brass Crutch - - 10bar - - 28mm 28mm - Compression -
RS Stock No. 794-8426
Mfr. Part No.XVES050900
£38.80
Each
Units
1/2 in BSP Male - Stainless Steel - - Cold Water, Hot Water 5bar Male - 1/2in - - - -10 → +99 °C
RS Stock No. 138-5638
Mfr. Part No.1341003
BrandSferaco
£2.82
Each
Units
3/8 in BSP Male 3/8 in BSP Female Chrome Plated Brass Butterfly Brass - 10bar Male Female 9.53mm 9.53mm BSP BSP 0 → +90 °C
RS Stock No. 138-5634
Mfr. Part No.1325004
BrandSferaco
£2.79
Each
Units
1/2 in BSP Male 3/4 in BSP Male Brass Knob Brass - 10bar Male Male 12.7mm 12.7mm BSP BSP 0 → +90 °C
RS Stock No. 138-5639
Mfr. Part No.1340003
BrandSferaco
£2.76
Each
Units
3/8 in BSP Male 3/8 in BSP Female Brush Plated Brass Butterfly Brass - 10bar Male Female 9.53mm 9.53mm BSP BSP 0 → +90 °C
RS Stock No. 138-5651
Mfr. Part No.644055
BrandSferaco
£16.14
Each
Units
3/4 in BSP Female 3/4 in BSP Male Brass Butterfly Brass Water Distribution 20bar Female Male 19.05mm 19.05mm BSP BSP -10 → +120 °C