A question on shower performance
- Thread starter fezster
- Start date
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That probably is true, as the polypipe is not lagged at all. Something I didn't realise was required at the time the system was installed. However, my issue is that the first shower (closest to tank) reduces flow when the second or third showers are turned on. Given the amount of incoming mains pressure and flow, I believe it should be possible for this shower to continue to function unimpeded even with other outlets open. I'm wondering if my expectations are too high, because it still performs perfectly adequately, but there's a noticeable drop which I think there shouldn't be.
Update on this. Attached a pressure gauge to my outside taps (bypassing PRV) and got a solid 4 bar.
On the bath taps and on the shower outlets, I'm only getting 2.2 bar. This is on all 3 showers, with varying lengths of pipework. Megaflo is due a service, so hopefully it's just the strainer, but anything else I should be asking the RGI to check?
On the bath taps and on the shower outlets, I'm only getting 2.2 bar. This is on all 3 showers, with varying lengths of pipework. Megaflo is due a service, so hopefully it's just the strainer, but anything else I should be asking the RGI to check?
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what rating is the pressure reducing valve?
Your downstream pipes will be a limiting factor, but spreading this over two different threads will not help.... Try and pick one and post there.
Update on this for the benefit of others. Increased the pipe size attached to the 32mm incoming main from 22mm to 28mm. And increased the megaflo output to 28mm as well as the balanced cold, for approximately 2-3 metres - whatever was accessible in the garage.
This has made all the difference. A single shower feels much better, but more importantly, even with all 3 showers running, they are all extremely good. I wouldnt say there is no drop off in performance, as there is. But it's not as dramatic and because performance has increased anyway, the drop is now on par (or better) than what I was getting with just one shower previously.
A few notes which are important:
1. I have a 22mm/ 3/4" bsp water softener sitting in between the 28mm pipework at the start. To put paid to the myth that there is no benefit to increasing pipe size downstream.
2. My gut feeling is that the 28mm pressure reducing valve has had a big impact on performance. Looking at the haetre sadia 22mm one, the orifice is tiny - how they claim to get 70 l/m through that, I don't know.
Hope this helps someone else.
This has made all the difference. A single shower feels much better, but more importantly, even with all 3 showers running, they are all extremely good. I wouldnt say there is no drop off in performance, as there is. But it's not as dramatic and because performance has increased anyway, the drop is now on par (or better) than what I was getting with just one shower previously.
A few notes which are important:
1. I have a 22mm/ 3/4" bsp water softener sitting in between the 28mm pipework at the start. To put paid to the myth that there is no benefit to increasing pipe size downstream.
2. My gut feeling is that the 28mm pressure reducing valve has had a big impact on performance. Looking at the haetre sadia 22mm one, the orifice is tiny - how they claim to get 70 l/m through that, I don't know.
Hope this helps someone else.
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