Stuart Turner Monsoon Universal 4 bar twin - HUNTING

[doitall]

Ok do Tony's test only slightly different.

Turn the main stopcock off, the inside one and open the kitchen tap.

When it's down to a constant dribble, valve the pumped hot and cold off. Best turn the electric to the pump off as well.

Does the dribble stop.

Turn the pumped supply back on does the dribble start again.

 

[woodfordma]

Do you mean close the valves on the pump hot and cold outlets?

Thanks

 

[doitall]

Yes.

Leave all the mixer valves in the normal position.

 

[woodfordma]

Hi

I was out last night so was unable to do the test. though I shall do this test tonight.

Though last night when I came home and I turned on the mixer tap on the first floor (pumped hot and cold mains fed) with the mixer all the way over to the cold side, for a few seconds when I opened the tap the water got warmer and then went cold. Not sure whether this is a clear sign of hot crossing over. The pump was plugged in all day whilst no one was home for over 12 hours. This isnt uncommon really but it feels like it has significance in my situation.

 

[Agile]

An unbalanced shower mixer would be a prime suspect!

Do some tests!

Tony

 

[woodfordma]

Hi Tony. I did the tests you asked for and gave results in an earlier post. Let me know if you have a test which will identify this as the cause.

I'm really keen to get this problem sorted out and so even if we suspect it is the mixers causing the problem I still need a professional to verify this and then to resolve it.

Would you travel to SE5?

Tonight I am doing doitall's test which is to turn off the mains outside the house and the one in the basement. Leaving the kitchen cold tap on until it is a steady dribble and then isolating the hot and cold outlets of the pump to see if it stops the dribble (and also unplugging it).

Thanks

 

[doitall]

No you are turning just the inside stopcock off.

The test should prove whether the stopcock is letting by or you have a backflow

If the dribble doesn't stop then you can turn the outside valve off to see whether that stops it.

 

[Agile]

We need to know if this trickle stops or reduces when you turn off the street stopcock. In other words we want to know where its coming from.

If it does NOT stop then see if moving all the mixers from cold to hot positions makes any difference.

Unfortunately, you chose to watch a film rather than timing how often the pumpo cycles. We need to know about anything which makes any difference to the problem.

I can travel to SE5 but I dont normally get involved with mixer showers.

There is something which we have not investigated. You have been turning off the hot OUTLET valve! Do you also have a valve on the hot INLET? If so what effect does it have on the problem?

Tony

 

[doitall]

I can answer that Tony, the pressure will drop and the pump will run dry, which is why I suggested the OP turns it off during the test.

I posted a manual for you if you want it, a danfoss 4033 or something like it.

 

[woodfordma]

My findings so far.

Isolated hot inflow. Pumped hunted so i opened it again so it doesnt run dry and damage pump.

Next I closed mains and opened kitchen tap til steady trickle. Closed pump hot and cold outlet. Trickle stopped immediately. Then I opened them again but trickle did not restart.

Started test again by opening mains and closing again but the kitchen tap no longer trickles.

Doitall's main test now in progress!

Thanks

 

[doitall]

Next I closed mains and opened kitchen tap til steady trickle. Closed pump hot and cold outlet. Trickle stopped immediately. Then I opened them again but trickle did not restart.

When you opened the hot and cold outlets did you turn the pump back on.

You say the trickle stopped, did the pump still hunt.

Can you do the same test but close the hot and cold separately and post what happens. Do the cold side first.

 

[woodfordma]

Yes I turned the pump back on too.

During your test where I turn mains off but leave kitchen tap on (and mixers in normal position) the pump continues hunting every 22-24 minutes. Tha mains has been off for about 3 hours.

As I said, if I switch mains off now and open the kitchen tap there is no more trickle. I will try the test tomorrow and see if it goes back to a trickle.

Thanks

 

[Agile]

During your test where I turn mains off but leave kitchen tap on (and mixers in normal position) the pump continues hunting every 22-24 minutes. Tha mains has been off for about 3 hours.

As I said, if I switch mains off now and open the kitchen tap there is no more trickle. I will try the test tomorrow and see if it goes back to a trickle.

Thanks

Perhaps DIA knows this but I dont know what a "normal" position is for a shower!

If the trickle stops when you turn off the stopcocks than the source of the trickle is the valves not completely closing. We were hoping it was a cross-oven leak in a shower mixer. Now we have to investigate other possibilities!

Tony

 

[doitall]

The dribble stopping is brilliant, all you need to do know is find out why.

Ok sticking with the assumption a mixer tap or valve is the problem.

Is the pump still hunting.

If it is you need to do the test again, but different this time.

Turn the mains off inside and open the kitchen tap as before.

Next if/when the dribble stops, move each mixer tap/shower one at a time, from hot to cold then back but give each one say 10mins for the dribble to return.

To make it clear you are only moving the temperature control, then check for the dribble then move it the other way and check.

Slow process but hopefully it will ID the problem fitting.

 

[woodfordma]

Mixers in normal position means halfway between hot and cold.

Not following your last comment. After I turn off the mains the water would normally trickle from the kitchen tap if open. However when I closed the valve on the pump hot and cold outlet and unplugged it the trickle stopped.

I then opened the hot and cold outlet and plugged back in the pump. The trickle did not start again. So then I closed the tap, opened the mains to allw water back in the system and the closed the mains again. Now when I open the kitchen tap there is no longer a constant trickle.