What do people use for joining 3/4" hoses?
Im replacing a few older hoses with new ones, and as is common, im using a combination of performed bends (cut of other hoses) and straight sections
of coolent/heater hose.
1/2" you can use 15mm copper water pipe fairly well i guess. And you can get custom cnc'ed aluminum joiners from the silicon hose
brigade.
But im just wondering what most people use and a cost effective but unbodged looking solution?
Daniel
look on car builders solutions or demontweeks.
i have some aluminium ones, about 4 quid each.
22mm copper pipe - if you get the stuff that pre-soldered it comes with built in ridges for you
3/4" is 20mm (near as dammit) so 22mm should fit. It'll be a tight squeeze and you might need to warm the hoses first in some boiling water
to make them fit over the 22 pipe (use some antifreeze as lube as well).
Silicon pipes are more flexible so will take +/- quite a few MM easily (depending on the tube diameter)..
Fair enough.
- Oddly i hadnt even thought of using 22mm copper pipe! I guess theres no issue with copper in the cooling loop as long as its clean because its all
delt with with the inhibtors in the antifreese?
The hoses dont creep off under the pressure without a barb or flareed end?
Daniel
Cross-sectional area of 22mm pipe is about 0.6 sq inch, so a pressure of 15 psi gives a force of about 9 pounds.
If you can secure the hose to withstand a ten pound pull you should be OK.
I find that roughing the end of the copper tube, a smear of Hylomar jointing compound and a good quality Jubilee clip works every time. 
John.
Pipes blowing off is never a problem with traddional rubber hoses --- silicone seems to be a different matter.
quote:
Originally posted by dhutch
The hoses dont creep off under the pressure without a barb or flareed end?
Daniel
quote:
As MikeR says use the pre-soldered ones and you get the flares for free
See http://www.screwfix.com/prods/47218/Plumbing/Solder-Ring-Fittings/Flowflex-Straight-Coupling-22mm-Pack-of-10
If you want you can replace the straight runs with 22mm copper tube, fewer jubilee clipped joints.