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Right then, i started this so here's my person update! In the quest for a decent shower i searched for a variable PRV that had less restriction that the one which comes with a megaflow as standard and came up with a Reliance 520-467-0802 which can be set at a max of 5 bar from...

I have been seriously considering replacing the supplied 3/4 inch fixed pressure reducing valve with a 1 inch variable one to see if I can get better shower pressure at, say, 3.5 or 4.0 bar. I wouldn't go above this. We have been very careful with pipe diameters and we have 1 inch supplying the...

I need 28 drawer fronts in gloss burgundy (not red) made to measure - can you help? If so [email protected]. Many thanks. Mark.

Hi Chris Thanks once again for your constructive comments - just spent tonight taking out the iBox and removing the NRV so will see whether any improvement in the morning but now seen your "bit" above! Also i do have the one with a diverter so note your comments on that possible issue as well...

You could certainly try it. If the PRV is indeed causing a severe flow restriction (which it should not, but I understand you want to prove this) then you should see some difference in taking the shower's cold feed from the mains pressure inlet side of the PRV. However, if you like your...

I think I was comparing apples with apples as close as makes no difference; reasoning:- Before - restricted CW supply to combi at ground floor with HW coming out through 15mm to bathroom shower about 10m away. CW supply direct to shower T off CW supply before combi. After (before final instal)...

As I have said - I had the benefit (thank goodness) of experiencing the same pipework and mixer set up on one shower before and after megaflow installation so am comparing apples with apples. Otherwise you'd have me questioning my own sanity. I have however spoken to Hansgrohe, downloaded...

Thanks for your post I understand the difference between pressure and flow rate and how you can have one good but the other poor. But nothing at all about DYNAMIC pressure - anywhere i can read up on it in greater depth please Tony? Thinking about it though, this still would not explain...

Hi there Thanks for your email - as i have said i was somewhat surprised to say the least. I note all that has been said and am certainly keen (to say the least) to find an alternative solution and provide me with a shower more like we had before. So do you have any take please on my idea...

As above, so far I've been told if i remove the PVR and replace with a double check valve:- 1. I'll kill everyone in the house. 2. I'll invalidate my house insurance. 3. No plumber worth their salt would recommend doing this. Well I have been keeping this bit quiet whilst i listened to...

Hi and thanks for your message You will see I have made another posting earlier this morning, I hear what you say but any thoughts on:- 1. Before I had 4 bar/40L going into the combi and then maybe the combi sent out 20L of very hot water to the shower mixer. 2. Before I had 4 bar/40L cold...

Must be thick - don't really understand that post?

I don't think you understand what i am getting at. There may not be a fault in the megaflow in so far as 2.8 - 3 bar is what they are set to pump out and reducing flow from 40 l/min to 28 l/min comes part and parcel of going through the PRV which must restrict flow rate more than any amount of...

Thanks Chris I've answered a few of your questions above in red. Looks like it's simply an expensive mistake installing a megaflow rather than traditional gravity fed system with a couple of s##t hot monsoon pumps for the shower then! Having read everyone's theories (and i am not a...

I hope you won!

To be exact Thames Water measured the pressure and flow rate at the meter just outside our boundary as 4.2 bar and 40 l/min - this was after new mains was installed in our street and new bigger bore blue pipe from the mains to the meter. At the same time as they were digging it all up I had the...

Hi IannIann Thanks for your reply which I think has now got to the crux of the matter. As per my initial posting:- "Had it all checked by a different plumber to that who installed who reckons we've got 2.8 bar and only 28 l/min coming out the megaflow which is then 2.5 bar and 22 l/min once the...

Dear Do It All "For a starter we ain't in mainland Europe" - thanks for pointing that out. Whilst off subject there are many things in the UK woefully under specified compared to Europe and the rest of the world which doesn't necessarily mean the UK specification is best and it would merely be...

Thanks for the speedy reply. I was led to believe that the PRV set at 3 bar was a level set by megaflow in case pipework was questionable, nothing to do with safety and it was the expansion relief valve which was the safety valve set at 6 or 8 bar for the pressurised cylender? In which case...