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Hi guys do any of you use 35mm check valves and where do you find best suppliers and prices ?

Hi Agile- Would i need 1 or 2 motorised valves and where would you advise i put them ? Im assuming i couldn't mount them in the 35mm pipework could i ? The pump that is their at the moment is controlled by both boilers and has an overrun of 5 minutes could i link the valves with...

HI Lcgs- The plumber said when he did the calcs it came out at 50 kw. Can you enlighten me to what a robo kit is. We have got at least 6 sytems we have installed exactly the same and never had problems with also running with 15/60 pump. Just like to add the plumber chooses the boilers and...

Hi Agile- I asked the owner of the house which is at the moment a 5 bed detached property what he had planning permision for and he said it would it would end up being 9 bedrooms . I will ask the plumber to check calcs like you suggested. Who do you use for reasonable priced check valves ?

Thanks we were intending replacing the alpha with a light comercial that we have allready. and we were thinking of using the alpha as a shunt pump.

Hi Lcgs thanks for your help, i have now loaded the pictures that people have been asking for , what are your thoughts on the low loss header. If we fit 1 we may make it ourselves but we would need to know the dimensions i have downloaded the diagram off the Kelston site but i dont know if this...

Hi lcgs have you got a better copy of the diagram because it is very faint and when i zoom in it goes blury. Can you tell me how to post pics from the album in my profile because i have 5 pictures of the system.

HI Agile i have updated the thread to try and give more accurate info i dont know about the megaflow / 60kw equation im just writing down what the parts in the system are. I couldnt isolate boiler as you sujested because their are no isolating valves above the boilers. I spoke to the plumber...

Tried to add pics tothe post they were showing when i typed it up but will not show with the text anyone know what im doing wrong ?

Hi everyone been to the site today to take pictures. I also got pipe size wrong flow from boilers to pump=35mm then under floorboards to ground and first floor=28mm. If you can see pics flow comes out of left hand boiler and picks up flow from right hand boiler on its way to the pump. Boilers...

Thanks for all the input were trying to get the most cost effective solution to make the system work properly. I will try and get pics asap thanks for being patient.

I have just checked the spec on the pump and it is 1.3m3h-2.7m3h If we fitted a shunt pump would we fit it in plsce of the auto bypass valve or as well as.

HI Loony i have adjusted the output of the boilers in the software. Their is also a megaflow just next to the boilers i think this is connected to the 35mm primaries. I think he didnt run 35mm under boards because of the amount of timber he would have had to cut out of the joists, The system on...

35mm just from the boilers to the floor then 22mm. The primaries are as you described although flow and returns are equal lengths. Could i lower the return temprature by icreasing the differential ? I have also got the return stat on the sequencer set at 50c which will hold the lag boiler off...

Try the pressure washer with the jet set on pin point it should lift it.

Hi Argile spoke to the plumber today the system has been designed for a 50kw load all calcs were done correctly. The original design included a large extension that the owner had planning permision for but he has postponed the new build for the moment. The pump is not running flat out which...

We have had the gloworm engineers out to have a look and he said its a bit bigger system than he is used to ,but he was satisfied both boilers were functioning correctly.

Will post photos as soon as i can can i just point out i am the electrician who helped the plumber install the system we have 6 similar systems that have never been a problem with. we havn`t installed any check valves in the pipe work but neither have we an any of the other systems either...

Owner of the house says the boilers are faulting even when they are not operating and are using the imersion heater. I have replaced the flow sensor on 1 of the boilers to see what happened but made no difference.

Hi have installed 2 gloworm ultracom 30hxis piped in parallel unvented system in 38mm pipe reducing to 22mm under floorboards, have fitted a grundfoss alpha 2 pump,The boilers are wired through a warmworld boiler sequencer.This serves a large detached house with 3 floors and...