Twin bath valves into single bath filler

[MBHomeImprovement]

Hi. I need some advice.

Been looking at buying a set of twin bath valves for hot and cold, and using an overflow filler like these:

https://www.qssupplies.co.uk/bathroom-furniture-shower-taps/2952.htm
https://www.grohe.com/30898/search/...roduct=28990-X999&color=000&material=28990000

This seemed like a simple idea at first, but I'm a bit stumped trying to figure out how I'm meant to mix the hot and cold together. Is there such a thing as a manual mixer valve? I've found plenty of thermostatic ones, but I don't want that as I'll be controlling the mix manually....or do I just need a double check valve on each line and pass those into a T joint connected to the filler? Would that be OK to do?

Any advice much appreciated!

Mike

 

[Madrab]

You'll control the mix by how much you open each valve? Don't confuse flow with pressure. As long as the hot and cold are the same pressure then controlling the flow with the valves would be like any normal manual mixer valve.

 

[denso13]

I've found plenty of thermostatic ones, but I don't want that as I'll be controlling the mix manually

You still control the mix manually with thermostatic ones. It just means that once you re happy with the temperature the "thermostatic" bit will (should) keep the temperature stable.

 

[MBHomeImprovement]

Thanks, but I'm still confused. I don't want a separate temperature control, so if I use a thermostatic valve surely I'd need a third valve somewhere to control temperature?

@Madrab, you mentioned a manual mixer valve...can you show me an example of one of these?

Thanks

 

[denso13]

I don't want a separate temperature control

This one https://www.parkstreetbathrooms.com...oncealed-Thermostatic-Bath-Filler-Set-AOL1048, for example, has one valve with two controls.

 

[MBHomeImprovement]

@denso13 i don't want to get a different valve, I am looking at twin valves as shown in the first link I posted

https://www.qssupplies.co.uk/bathroom-furniture-shower-taps/2952.htm

My question is, how are these valves meant to be mixed to pass to a bath spout?

 

[denso13]

My question is, how are these valves meant to be mixed to pass to a bath spout?

1 pipe from each tap into a tee then into the bath overflow filler, if it only has one connection. Are the hot and cold the same pressure and from a combi?

 

[MBHomeImprovement]

OK thanks, I had a feeling that was the case, but thanks for confirming. Really struggled to find an answer to that simple problem and yes the pressure is at mains pressure for cold and direct from combi boiler for hot.

In terms of regs, do you know if I'll need check valves on both feeds or just on the mixed? Cheers!

 

[denso13]

In terms of regs, do you know if I'll need check valves on both feeds

Might not strictly be required as the hot and cold are the same pressure, but I'd fit two.

 

[MBHomeImprovement]

That's great, thanks for the info!