Search results

Not sure where that's coming from? IME combi's can cope with a rain head shower without a problem, as long as the mains pressure and flow is up to it. A typical 28kw combi can output say ~12L/min @ 35deg rise, add in the cold mix then ~18L/Min is more than enough to supply most IMO. The rain...

Missed the smiley!

Yep - fair enough - bad choice of words. I still wouldn't want a client to be able to interact and isolate the EV from the system. Unfortunately in my experience, if some clients are given the ability to interact with things they shouldn't, invariably they will, probably why the 2 tesla...

I must be honest - a commercial 600L vessel - certainly makes sense and only something an experienced engineer would ever interact with - not sure it's the same on an 8L domestic tho TBF. We were always taught there should never be a means of isolation to/from a key safety device that a...

I can safely say that the rain showers in the picture are not 255mm, the perspective is all wrong. I have a Mira Activate with a ceiling fed rain shower head @ 250mm and it's no where near as big as it looks like in pic 1. To give an idea, 300mm is the size of a normal ruler and a typical...

Nope - All that needs to be done is isolate the rads at a valve (count the turns if it's a lockshield) and the system can be de-pressurised @ the loops or mag filter. Even then some systems will de-pressurise (not drain) without the rads being touched. As long as the system pressure @ the...

All Bristan taps use the same 1/2" valves, either 1/4 trun ceramic or turn down compression, so if you buy Bristan replacements they should fit without issue.

+1 re water too hot - get the stats turned down, looks like they could be set to max. I think the trouble here is that the Manu Instruction for the unit seems to be elusive - under the model WWAH250L - there doesn't seem to be much apart from a world heating reference. You should have been...

OK - normally I don't like to criticise someone else's work but if you wish. > I don't believe a slotted ISO valve fitted as an isolation point inline on the EV feed, that has the ability to be easily shut down, is best practice on a critical safety device - any valve designed and supplied for...

Given the age of the boiler, a gas valve for that is not going to be cheap as they'll be like hens teeth, unless it's 2nd hand.

Not wishing to rain on anyone's parade but unfortunately there are a couple of things on that setup that aren't strictly correct.

Nope - gas valve isn't usually serviceable - so it's normally a replacement.

Usually not no - have I seen it - yes but it's very rare. The trouble with using too much solder is avoiding it being drawn internally and then causing a restriction to the flow. Hence the reason to only flux the pipe and not the fitting, that avoids flux being pushed into the fitting and then...

The rule of thumb we were taught - length of solder to use = the size of fitting - i.e. ~ 22mm of solder for a 22mm end feed fitting. The other thing we were taught was pressure test - once a run is installed then pressure test it - Copper pipework = maintain 1.5 x max working pressure for...

Any work to do with the UV safety devices should be performed by a qualified engineer that would include the main EV. The EV take off positioning is fine on the cold feed to the cylinder, as it's there to absorb expansion from the HW cylinder, it doesn't have to be from the take off point on the...

Certainly, shouldn't be any need for a PRV on the mains if there is another PRV in the CG if all hot and cold is taken from the UV and the balanced feed, sometimes though that isn't the case, not sure with this system. There could be other outlets fed from the mains, not from the balanced side...

Exactly - It will tell use one thing - if it is a valve in the Control Group that's creating the knock and yes the cold feed will still be balanced by the PRV @ the mains. Lots of time spent on this and it's probably time to find the culprit IMO. Easy enough to run through a process of...

Trying to see this correctly - re the video of the gauge - there's one knock when the tap is opened and the water runs then another when the tap is shut and the water stops? Not really - there probably isn't anything wrong with the valve in the control group, if it is being impacted by a...

It really does sound like the group's PRV is knocking, bypass it and see if it stops.

That is peak flow but if this is to be a HMO then you want to know dynamic pressure and flow to ensure the mains can handle multiple outlets running @ full flow @ the same time. Run at least 2 CW outlets whilst filling the container from a 3rd. If you have an outside tap then connect a...