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if there's a prv on the pipe that feeds from the pump towards the megaflo, and this prv is set at 2 bar, how does pressure at greater than 2 bar get beyond this PRV? That's the bit that's confusing me. Obviously we want, say, 4 bar going out of the booster through the pipes up to the megaflow -...

ah, ha - I think I'm getting it, but not totally sure!! I've used your numbers in the example below, to see if I've got it or not... As water is held in the tank, there is no pressure in it. The pump charges the pipes by sucking in some water and pumping this against the PRV to 2 bar and then...

Thanks for reply. Why does it need a pressure reducing valve on the outlet side? The pipe will run from the homebooster to the megaflow, and on that pipe run (near the megaflow) is the pressure reducing valve that is installed on the megaflo mains inlet pipe. Isn't this existing valve enough...

Hi, Ideally I'd like to find someone who is experienced in installing these and would do work in the Surrey area. I don't suppose these are common installations for plumbers? Failing that, I'd like to see if there's someone on this forum who is experienced in homebooster installation, and...

To all - your guesses were all wrong. The pressure had been lost in the system. I noticed in the loft the small pressure vessel beside the megaflo showing 0 for pressure, and remembered that it was usually 1.5 bar. I think it may have dropped when I bled the radiators, but not sure if that's...

Hi, Turned on central heating and it does BANG, BANG after about 60 seconds - really loud - then boiler cuts out, showing overheat symbol. Pipe leaving boiler is red hot, and lots of steam out of vent pipe. I think there's air in the system. bled all the rads - still the same. Opended screw...

Does anyone know how noisy a Grundfos Homebooster is? Would it be the same as a typical 2 bar shower pump? Also, I'm thinking about how I could use it only when needed (shower time 7am-9am ish) and evening kids bath (7pm ish), as really all we are trying to do is make the showers more...

Thanks for the advice. What size pipe would you recommend between the accumulator and the megaflow. It's currently 22mm run to the megaflow - would you suggest bigger? What size will the entry port to the megaflow be? I assume this is 22mm, so it will reduce at this last point (but appreciate...

Thanks for some useful tips, whihc I'll think through. I'm leaning towards an accumulator in the ground floor utility, whihc is about 3 metres awat from the incoming main. This can then reconnect back to the already installed 22mm copper feeding up to the megaflow in the loft. This would give...

We've tried a range of shower heads - originally a big plate sty;e (Hansgrohe raindance), now a 10cm one, and a mira hand held one in the bathroom. Slightly better, but not much. Am I measuring dynamic pressure in the right way? I've attached a good pressure gauge to the outside tap for the...

Just to clarify - I didn't do it myself!! I won't risk messing around with a pressurised system (I don;t want to kill myself!) It was installed by one of the plumbers who quoted - when each of the 4 called to quote, they tested the static pressure. The total job cost £9k for labour only, plus...

I had 4 different plumbers come round, and all measured the static pressure and said, 'fine'. It's only now that I have had to do all the reading up on this, that I can see that what thye should be doing is measuring the dynamic pressure and flow rates too. None of them did, and as I'm not an...

Hello, I've read a lot on this forum, so hopefully I can start with a few facts: I have installed a 250l indirect UV megaflo in the loft. It is fed by 22mm copper from the 22mm stoptap under the sink. Incoming main is 22mm Polypipe. Pressure & Flow: Static Pressure at outside tap off...