Recent content by grobsy

cheer Terry, that will be the next thing I check. CWSTank is approx 500x500x900 with a fairly poor replenishment rate. I will run the shower and sit and watch the water level. Will let you know how this goes....

thanks for your reply. I was thinking a dedicated cold feed might be my next step. I have now installed a dedicated cold from tank and they are still getting airlocks. First the cold to the shower shuts off and then hot gets airlocked if they dont switch off immediately... I dont know if I...

Initial Plumbing set-up: Loft: Cold water tank with 1x 22mm feed to HWC, and tee-ing off this 22mm just after it leaves the tank is a 15mm HEP feed down to the Cold side of the shower pump under the bath on ground floor. (there are no other Cold feed off the tanks as all the cold taps are mains...

thanks for your replies. Just to clarify. I just did drain down 2x now but no powerflush, but system looked fairly clean. I might have confused terminology on use of expansion so to recap - The order on the Boiler Flow is: Vent pipe 22mm teeing off above the boiler (I think I...

I installed a Worcester Bosch 18RI to an existing open vent system but there is really bad circulation. some rads ok to Luke warm and a couple still cold. I have been back 3x to bleed air out of the system. 2 rads particularly bad. Air still rattling past pump (located in basement) and...

only roughly. just making sure heat makes it down to the floor below. [the 2 troublsome rads are on the top floor (as is pump, zone valves), with boiler above in attic.] The rads only make noise after a while, and the noise can be temporarily fixed with a turn of the TRVs, but tends to...

yes, adjusting bypass down to 0.25bar has got rid of noise at cylinder cupboard / pump / boiler. but, there is still noise at a couple of rads??? any suggestions???

Thanks for your reply Agile. The bypass (a Myson 22mm) was screwed completely shut (clockwise) by the initial installers. I have since slackened it off to about 0.45bar (this ABV ranges from 0.6 down to 0.1bar). Still bad noise. I have since adjusted it down to 0.25bar. With the system...

The pump over-run was wired in from the boiler PCB a couple of weeks after the boiler was installed. It now runs on for a while after the heating switches off. The noise occured both before & after the pump overrun was wired in. The pump speed is set to III (3). Is it better for...

System: I have a sealed s-plan system with boiler in loft, Grundfos 25-50 Pump + unvented cylinder in cupboard in top floor, 22mm pipework supplying 5 towel rails & about 13 traditional style rads all with TRVs. Problem: The system was heated with an underspec'd Worcester 18KW Ri, but this...