elec shower, help please...

[cammy22]

Hi. I'm installing a new shower. Bottom left with rear entry. I have 10mm pipe coming from tiled wall, blanked. Inlet is plastic 15mm. Today I bought 10mm comp elbow, 15mm comp elbow and a 10x15 feed end reducer. I thought this would work. Now I see reducer won't fit the elbows? Please can you guys help...
Thanks in advance...

 

[josh]

What made you put 10mm out the wall?
would have thought them reducing fittings you put in compression would have worked to be honest! sure you put it the right way around?

 

[Dotty]

You won't have the flow rate you need and your pressure will be degraded.

Bite the bullet, pull it all out and redo it in 15mm

 

[IDCHAPPY]

The person that first put microbore in a wall to feed a shower needs a dam good poke in the eye...

 

[Centralheatking]

Sound advice from an expert 'commercial' professional CHK

You won't have the flow rate you need and your pressure will be degraded.

Bite the bullet, pull it all out and redo it in 15mm

 

[Centralheatking]

HEY YOU are you on call or what can I email you Rob reply each way mate

 

[Ray Stafford]

Out of interest guys - why would 10mm be a problem?

The flow rate of an electric shower is puny at the best of times - maybe 3 or 4 litres a minute, absolute tops?

I would have thought that a mains fed 10mm pipe could easily manage that, with flow to spare?

 

[IDCHAPPY]

Out of interest guys - why would 10mm be a problem?

The flow rate of an electric shower is puny at the best of times - maybe 3 or 4 litres a minute, absolute tops?

I would have thought that a mains fed 10mm pipe could easily manage that, with flow to spare?

Some electrics showers give 7 liters + pm. when you have it ramped up to high the flow rate suffers and some showers can go to high temp lockout, especially if someones flinging mud then flushes the cludgy 😉

 

[Centralheatking]

Ray you hurt my head from time to time - what you say seems to make sense
but ....... we always do lecky showers in 15mm mains fed Jon help me CHK QUOTE=Ray Stafford;662435]Out of interest guys - why would 10mm be a problem?

The flow rate of an electric shower is puny at the best of times - maybe 3 or 4 litres a minute, absolute tops?

I would have thought that a mains fed 10mm pipe could easily manage that, with flow to spare?[/QUOTE]

 

[Dotty]

Those that can, do. Those that can't shake down those that can until their teeth rattle....

 

[Dotty]

HEY YOU are you on call or what can I email you Rob reply each way mate

I just did buddy. I'm terrible at checking my emails!

 

[cammy22]

I have tiled the room, ripping out isn't an option!
I will attach a pic, maybe you can throw some options out...

 

[cammy22]

I have tiled. Ripping out isnt an option!
I will attach a pic, maybe you can throw some options out there...

 

[cammy22]

 

[kris]

You may get away with 10mm but 15 is standard rule of thumb. (right way) showers now will give u a min press to adhere to instead of flow rate . Use a 3 piece compression reducer inside a 15mm compression bend . If your cold main has good enough pressure it may suffice . Only thing 10mm should ever be used on is gas fires. ( just my opinion)

 

[cammy22]

yeah i see it should be 15, i have no idea why he used 10. cowboy.
But the thread isnt about the fact its 10, its about how to connect the 10mm pipe to the 15mm inlet. What is this 3 piece reducer? is it this...

travisperkins.co.uk/p/compression-internal-reducer-15-x-10mm-dzr/950051/3961030

 

[Killy Bing]

Is the 10mm in plastic?

 

[Ray Stafford]

Some electrics showers give 7 liters + pm. when you have it ramped up to high the flow rate suffers and some showers can go to high temp lockout,

7 litres per minute, even on a 10.8kw leccy shower would only give a temp rise of 16 degs. At a sensible rise of 35 degrees, the flow rate is only just over 4 litres per min. And thats a 10.8 kw shower - adjust down for 9 or 8 kw.

and surely most showers come with a flexible hose with a bore miles less than 10mm, which makes the inlet bore somewhat moot?

especially if someones flinging mud then flushes the cludgy 😉

I can see words here, but would appreciate them transalated into English ? 🙂

 

[lame plumber]

noisy water flow in 10mm as well

 

[mike-c]

This is the style of the 3 piece reducing set that you need. It will fit inside a compression bend.

 

[AWheating]

An endfeed elbow with a fitting reducer will do it if you can get it back to the wall enough

 

[spanner]

10mm feed to instantaneous. Then you're reducing it again with additional elbows.
If it were me I'd put 15mm before ever thinking of turning on the shower. Sure you may Experience surge in the main water feed @ high demand times. Boshboshbossboss