Non-return valves for outside taps

[screamer]

I have 2 outside taps, but they don't have any check valves on them, where's the best location to fit the check valve?

Just after the tee from the main pipework

or

nearer the tap

 

[jj4091]

Buy a hose connector with a built in check valve.

 

[CountryFan]

Should have an isolation valve, then check valve, then a drain off and then the pipework to the tap. Ideally they should be located inside the property, not as just a replacement tap with them built in.

 

[opps]

Should have an isolation valve, then check valve, then a drain off and then the pipework to the tap. Ideally they should be located inside the property, not as just a replacement tap with them built in.

The drain off should be in the property? Sorry, I am not a plumber. On a horizontal run, wouldn't the exterior tap be sufficient as a drain down?

I am happy to be corrected.

 

[opps]

I have 2 outside taps, but they don't have any check valves on them, where's the best location to fit the check valve?

Just after the tee from the main pipework

or

nearer the tap

I am not a plumber, but you can buy taps with double check valves built in. Would that not be the path of least resistance?

 

[CountryFan]

The drain off should be in the property? Sorry, I am not a plumber. On a horizontal run, wouldn't the exterior tap be sufficient as a drain down?

I am happy to be corrected.

You can use the tap, however if the tap is higher than the pipework as is often the case then the drain off should be located inside the property.

 

[screamer]

Cheers, 1 tap is outside and the other is just inside the garage door, both have gate vales to shut them off for winter.
I'll add the check valve after this and also add in a drain cock.

Cheers

 

[Madrab]

you can buy taps with double check valves built in

If it isn't isolated and drained down then they can freeze, that typically bursts the check valve internals rendering them useless.

If there is a downwards path from the supply pipe Isolation to the outside tap and the pipe can be drained then no a drain off would not be needed. An internal check valve is always advised and if the supply pipework is in a non heated/insulated space then the pipework and valves should always be insulated.