Hi guys can anyone tell me if there is optimum position/layout to place a 22mm to 15mm reducer on the central heating circuit. Is it better to use a T at this point for more than just ease? ie flow. Should the 22mm feed be longer than the return? Is it best to reduce after the last branch to second to last radiator? Hope this al lmakes sense. thanks in advance.
Reducing 22mm to 15mm on central heating trunk.
- Thread starter 64000000
- Start date
Sponsored Links
Don't really follow you well here... 22mm pipe will give better flow rates than 15mm but it all depends on the size of your system as to what is required.
As a basic rule of thumb the largest diameter should be nearest the boiler then taper down as you get to the last rad. Same on the return.
As a basic rule of thumb the largest diameter should be nearest the boiler then taper down as you get to the last rad. Same on the return.
Sorry your missing my point my fault im not explaining it very well. I have 22mm round most of the house the last two rads (not getting very hot) are on 15mm the redcucers are on straight runs of pipe. Would they be better on Ts. Ie at the third to last rad 22mm down to 15mm on the branch and to 15mm on the trunk. Or will this not make any difference.
Sorry, I'm not quite getting it. What do you mean by trunk? Also, not sure how you can replace a reducer with a tee being a different fitting.
A system with a mix of 22/15mm should work spot on with a bit of balancing, have you tried that?
Maybe draw a diagram and post it up.
A system with a mix of 22/15mm should work spot on with a bit of balancing, have you tried that?
Maybe draw a diagram and post it up.
Sponsored Links
Ah, trunk is probably American terminology then.
There's nothing wrong with the second picture, the system will just need balancing. Do a search for balancing radiators.
There's nothing wrong with the second picture, the system will just need balancing. Do a search for balancing radiators.
DIYnot Local
Staff member
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local
Sponsored Links
