Printable Version | Subscribe | Add to Favourites
New Topic New Poll New Reply
Author: Subject: Xflow water pump outlet thread size
joneh

posted on 26/12/20 at 03:56 PM Reply With Quote
Xflow water pump outlet thread size

Hi all,

Does anyone know what thread for the hose adapter is used on a crossflow water pump. It's the smaller hose that runs to the heater matrix, or in my case straight to the inlet manifold.

I assume its 5/8 NPT as it's near 17mm but it doesn't poke through my 5/8 bolt size checker thing and other sites suggest its 3/8 which is way too small.

My current adapter is too small on the hose side, which I'm trying to match with the inlet manifold (about 13mm).

Thanks!
Jon

View User's Profile View All Posts By User U2U Member
rusty nuts

posted on 26/12/20 at 04:02 PM Reply With Quote
I may have a straight fitting , can check tomorrow i
View User's Profile View All Posts By User U2U Member
obfripper

posted on 26/12/20 at 05:33 PM Reply With Quote
Imperial pipe thread sizes refer to the internal bore of the pipe it is intended to be cut on, not the outer threaded diameter, 3/8 npt sounds about right for 17mm od.
You may find some brass hose tails that will work from plumbing suppliers, the angled ones are dear from burtons and not available new anywhere else.

Dave

View User's Profile View All Posts By User U2U Member
joneh

posted on 26/12/20 at 07:11 PM Reply With Quote
Ah that makes sense and explains the confusion on my part.

Anyone know if I can just blank both these off as I don't have a heater, or does water need to flow through the inlet manifold?

View User's Profile View All Posts By User U2U Member
obfripper

posted on 26/12/20 at 07:52 PM Reply With Quote
They should be connected as you need bypass flow to help the coolant warm up evenly and prevent hot spots.

Dave

View User's Profile View All Posts By User U2U Member
joneh

posted on 26/12/20 at 08:01 PM Reply With Quote
Cool, thanks.

Jon

View User's Profile View All Posts By User U2U Member
steve m

posted on 26/12/20 at 08:56 PM Reply With Quote
The top of the Water pump vertical, and the inlet manifold are joined together, with 16/17 o/d mm hose, both of the threads should be the same,
and are the same as gas/plumbing fittings,
i cant remember which,

If you dont connect them up, with a downdraft carb, you will get carb icing, as the fuel will be to cold

steve





Thats was probably spelt wrong, or had some grammer, that the "grammer police have to have a moan at




View User's Profile View All Posts By User U2U Member
JMW

posted on 27/12/20 at 10:53 AM Reply With Quote
it will be a bsp size.
View User's Profile View All Posts By User U2U Member
JMW

posted on 27/12/20 at 11:02 AM Reply With Quote
Not sure now, thinking about it. Apologies for adding confusion.
View User's Profile View All Posts By User U2U Member
rusty nuts

posted on 27/12/20 at 11:26 AM Reply With Quote
honey,you have u2u
View User's Profile View All Posts By User U2U Member
joneh

posted on 31/12/20 at 07:35 PM Reply With Quote
Big thanks to Rusty Nuts (Mel) for sending me out the right size part and being too kind to accept anything for it!

Thanks!
Jon

View User's Profile View All Posts By User U2U Member

New Topic New Poll New Reply


go to top






Website design and SEO by Studio Montage

All content © 2001-16 LocostBuilders. Reproduction prohibited
Opinions expressed in public posts are those of the author and do not necessarily represent
the views of other users or any member of the LocostBuilders team.
Running XMB 1.8 Partagium [© 2002 XMB Group] on Apache under CentOS Linux
Founded, built and operated by ChrisW.