TopBanana
Well-Known Member
So I've ordered my pump, Calorifier and transom shower. What size hose is normally used to connect everything up? Most common sizes appear to be 13mm and 16mm.
What size of hose is normally used for pressurised domestic water?
- Thread starter TopBanana
- Start date
vyv_cox
Well-Known Member
Mine is all 13 mm, red or blue for hot or cold. But if you don't know what fittings come with your equipment it makes sense to wait until you do. Most caravan shops stock it so easy to buy, or chandleries if you must.
RichardS
N/A
That's interesting. My boat is also plumbed in red and blue with Push Fit fittings which look identical to the fittings I've used with 15mm domestic household plumbing. I'd therefore assumed that my boat hoses were also 15mm but I've never measured them because I've never needed to work on them.
That's something that I'll need to check before I order any parts.
Richard
Yngmar
Well-Known Member
15mm Whale Quickconnect: https://www.whalepumps.com/marine/siteFiles/resources/docs/resource-library/Whale_quick_connect.pdf
Also available in 12 and 22mm.
Note that the hot water fittings and pipe are only rated to 65°C, so if your engine runs hotter than that, you must fit a thermostatic mixing valve on the calorifier.
JG also has a similar and more or less compatible system.
Also available in 12 and 22mm.
Note that the hot water fittings and pipe are only rated to 65°C, so if your engine runs hotter than that, you must fit a thermostatic mixing valve on the calorifier.
JG also has a similar and more or less compatible system.
Hydrozoan
Well-Known Member
The common push-fit systems of which I know are Hep2O and John Guest (JG) Speedfit. I used the latter (in 15mm) for both hot and cold on the boat, and with its double-O-ringed pipe inserts (https://www.screwfix.com/p/jg-speedfit-sts15-pipe-inserts-15mm-50-pack/18100) have not had any leaks - which given my previous dislike of plumbing, pleased me greatly
.Mikedefieslife
Well-Known Member
15mm push fit stuff here. I have a mixture of Hep20, John Guest and Screwfix's own Flofit.
Hep20 has the most complete system, JG are the easiest to use, and the Flofit whilst it works fine without any leaks, isn't as good quality, and can be difficult to remove/reuse.
Hep20 has the most complete system, JG are the easiest to use, and the Flofit whilst it works fine without any leaks, isn't as good quality, and can be difficult to remove/reuse.
Plum
Well-Known Member
Don't forget that household plumbing pipe, copper or plastic, is 15mm outside diameter. The common flexible hose used on most boat freshwater plumbing is 13mm ( was half inch) inside diameter.
Www.solocoastalsailing.co.uk
RichardS
N/A
Ah .... so it is normal 15mm domestic hose. In both cases it's the OD which is relevant since both the copper pipe and the plastic pipe have to fit into the same 15mm push-fit connectors.
Richard
TopBanana
Well-Known Member
Thanks all. If 13mm will work, I'll go for that as it'll be easier to run fore and aft.
The calorifier is second hand and appears fitted with Hepworth pushfit attachments, a mix of both 15mm and 22mm OD. There are short standing ends of both 15mm and 22mm OD pipes coming out of the calorifier. Is there such a thing as a compression to hosetail adapter?
The calorifier is second hand and appears fitted with Hepworth pushfit attachments, a mix of both 15mm and 22mm OD. There are short standing ends of both 15mm and 22mm OD pipes coming out of the calorifier. Is there such a thing as a compression to hosetail adapter?
Hydrozoan
Well-Known Member
On my calorifer (Surecal) the short standing ends are not barbs (they are only very lightly 'serrated') but will take a standard push-fitting of the appropriate kind (which I'm sorry I cannot identify off-hand). Forgive me if I'm misreading your situation, but I took mine for hose barbs of some kind until corrected and just wonder if you might be doing the same.