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They are known for pumping in circles because of the bypass loop, so that will solve it. Tim

What model is it then an RHP? If it is then just fit a non return valve to the hot outlet then it should be fine. Please state the model as it can make a difference, I should have asked.

They are on the outlet side of the water section not the electronics area. If you have just installed it I don't think you should be stripping it down, if it's new. In fact you have worried me that you are looking in that section for the non return valve :roll: Tim

Hi, Some Salamander pumps have bypass fitted which allows the water to pass from hot to cold and vice versa, this is only meant to happen to eleviate the pressure build up in the impellers when only one side is used. There should be a non return valve or in fact two sets of non return...

Cracked it, Issue was non return valve in thermostatic shower, the cylinder is old and does not have a balanced cold inlet, so although the pressure reducing valve was working to the cylinder, When I turned on the cold the pressure was shooting up in the cylinder through the shower valve. Set...

It is a horizontal unvented cylinder. I had it made by Manco to fit into the eaves space in my loft.

Cheers Dan, P.s I am a plumber :D Admittedly not mains vent certified.

Hi Guy's, I have a horizontal mains vented cylinder in my loft, it is dripping from the pressure relief valve, I have changed the pressure vessel as is was faulty, and also changed the pressure relief valve. recently it has started dripping again, I really am not sure what it is. I have tried...

Sorry for the delay, It should be fairly logical, but make it easy for yourself phone Crosswater you can get thier number from the website as they supply all Bathstore brassware, get a replacement cartridge and job is sorted. they will also tell you how to remove the...

I looks like either Bensham (bathstore/Crosswater) or the Knightsbridge valve (older version) I know that the Knightsbridge will replace it as that has 130mm centers, but first try taking out the thermostat leaving over night in 50/50 vinegar water the re-grease using silicone grease, and then...

If it has a pressure vessel, try adding a bit of pressure with a bicycle pump. or call Stuart turner they are quite good over the phone at identifying faults. http://www.stuart-turner.co.uk/contact-us

They use a pressure vessel that stores a small charge of water pressure, so when an outlet is turned on you get a small boost of water then the pressure drops and it is that pressure drop that activates the pump. To answer the second part of your question I would have to know which product it...

Positive is when you have enough flow to activate a pump say 1 liter per minute and negative is when you got jack S#@t flow that can't even turn the pump on. Most pump manufacturers say that if you have 600mm of head (distance between the bottom of the cold water tank and the device (shower...

1.8 bar is not a huge pressure if you have a 2 story house then but the time you get up to loft shower height you only have 1.1bar and do not forget that would depend on the time of day the first test was done, if done outside hours when other properties are using there water in peak times it...

The sketch looks fine but use a Non stop Essex flange or techflange this link might help http://www.salamander-pumps.com/how-to/install-a-loft-pump.html which will explain about fitting a pump in a loft or higher than a HWC. Techflanges are fairly cheap and easy to fit...

It could do but only if it is bent more than a curve, really they should have no stress on them at all. The water starvation light should really only come on when there is a restriction or as it states there is a lack of supply water. If it is new and the Anti-vibration couplers are not...

Can some one please translate into English! :D

I would have thought that it is down to one of the showers then, if the pump turns off with other items, it is working!

RHP 140 http://www.salamander-pumps.com/rhp140-twin-whole-house-pump.html is a positive head pump, so if you have not had any new items installed on your system it will be either sticking flow switches which are located in the outlet side of the pump, remove outlet hose there will be a plastic...

There are two things to look into as quite rightly pointed out check that the nrv's in the shower are clean and if nessasary lubricate with silicone grease. The other thing to check is the flow switches or float that activates them these obiously can get limescaled up and might need a...