Last summer I had a plumber in to reroute my water pipes because they were taking a round trip of my house before returning to the bathroom and kitchen (the legacy of an old tank in the loft).
Here's my set-up:
Mains supply comes into my kitchen via 25mm MDPE pipe. Joined to this is a 15mm copper pipe, which after a six inch journey, splits in two. The first to supply the dishwasher, washing machine and boiler, the second to carry on to the bathroom directly above, to feed the cold supply to the toilet, basin and bath. The hot supply comes from the combi boiler below into the bathroom to feed the bath and basin, then continues back down to the sink in the kitchen below.
However, there is a small run in the bathroom where the pipes look to be 22mm, plumber said they were old imperial sizes.
When the rerouting was done I was expecting him to install 22mm pipe from the mains and feed off 15mm pipes from this for all the appliances. However he fitted 15mm along the whole run. He said because my combi boiler was only feeding out 15mm, the cold supply should also be 15mm.
Is this correct?
The pressure on the cold tap in the bath is now much higher than the hot supply, so when I fit a shower it's going to be imposible to balance the temperature. I'm thinking if I change the core supply pipe from a 15mm to a 22mm then it will lower the pressure of the cold slightly.
Since I'm about to redo the bathroom above and change the position of the washing machine in the kitchen, I'll be changing the pipe layout a little again. I'll be doing this myself using plastic push fit, so replacing the whole set up is fairly easy.
So incase I've lost you, is a 22mm common supply with 15mm feeders (22mm for bath) a better choice than my current setup which has a 15mm common supply pipe?
Pressure by the way is fantastic! My toilet currently refills in seconds and sounds like a rocket launching
Here's my set-up:
Mains supply comes into my kitchen via 25mm MDPE pipe. Joined to this is a 15mm copper pipe, which after a six inch journey, splits in two. The first to supply the dishwasher, washing machine and boiler, the second to carry on to the bathroom directly above, to feed the cold supply to the toilet, basin and bath. The hot supply comes from the combi boiler below into the bathroom to feed the bath and basin, then continues back down to the sink in the kitchen below.
However, there is a small run in the bathroom where the pipes look to be 22mm, plumber said they were old imperial sizes.
When the rerouting was done I was expecting him to install 22mm pipe from the mains and feed off 15mm pipes from this for all the appliances. However he fitted 15mm along the whole run. He said because my combi boiler was only feeding out 15mm, the cold supply should also be 15mm.
Is this correct?
The pressure on the cold tap in the bath is now much higher than the hot supply, so when I fit a shower it's going to be imposible to balance the temperature. I'm thinking if I change the core supply pipe from a 15mm to a 22mm then it will lower the pressure of the cold slightly.
Since I'm about to redo the bathroom above and change the position of the washing machine in the kitchen, I'll be changing the pipe layout a little again. I'll be doing this myself using plastic push fit, so replacing the whole set up is fairly easy.
So incase I've lost you, is a 22mm common supply with 15mm feeders (22mm for bath) a better choice than my current setup which has a 15mm common supply pipe?
Pressure by the way is fantastic! My toilet currently refills in seconds and sounds like a rocket launching