billythekid
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[quote author=JohnD link=1110212496/0#0 date=1110212496] 1. Is there any particular depth under floorbaords which pipes should be laid? Or is a 3/4" notch still o.k.?
2. End feed or solder ring fittings or doesn't it matter?
3. Where I tee off under floorboards and one pipe has to pass over another, is it best to have the bend in the flow side or the return side? Or doesn't it matter?
4. Years ago they used to use old carpet around pipe where they passed over joists to stop banging. What do I use now? Lagging?
5. When running my pipes up the centre of the room to a radiator at the far end of it, I assume that, as the joists are parallel to the wall I am running to, I run the pipe right over the first joist virtually up to the wall (there is a 2" gap between the joist and the wall) then fit a right angle bend to each pipe and after 2' 6" on each pipe then come up through the floorboards to the rad. This will mean that there should be enough give in the pipe to get the rad off.
The reason I ask is that it would be simpler to put my bends in one joist further back, and then run two pipes straight to the rad some 5' apart, but then I assume I would have more difficulty lifting the rad off the brackets for decorating etc. unless there was a very deep cut in the joist indeed, which wouldn't be good practice. Have I got it right?
6. Finally, should I lag the hot pipes and c.h., pipe under the floorboards? I assume this would prevent floorboard shrinkage and heat wastage but have never seen it mentioned.
Thanks
JohnD [/quote]
Some answers.
1: ¾ notch will be fine. (mark the boards so you dont nail the pipes)
2: Doesnt matter, if you are confident enough use end feed as they are cheaper, if you havent done too much soldering stick to the solder ring fittings. If using solder ring dont be tempted to add solder, just heat until you get the nice silver ring round the fitting. TIP: use plenty flux and wipe off with damp cloth once joint is made for a clean finish.
3: Doesnt matter, but give yourself plenty room so you dont need a tight bend, less bends the better.
4: Lag all your pipes anyway. lagging will do fine for creaking and dont cut your notches too tight.
5: Leaving plenty slack from the last joist might give more play, however to get the rad off the play is better horizontally i.e play in pipe side on to rad. I would cut the joist an inch or so for this notch laterally so this play is there(remember the floorboard will need an inch "hole" too.)
6: See 4
Hope this helps.
btk
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