Hose Adapters Engine to Water Heater

[svlittlewing]

I'm installing a water heater and need to reduce the 7/8" Westerbeke 58 flow controller fittings to 5/8 Seaward hot water inlet. I've searched for a reducer/adapter/coupling without any luck. Does anyone have a lead on such an adapter or have suggestions for making this connection? The hose length will be 7' each. Seaward calls for non-collapsing heater hose so I'm planning to use Trident hardwall blue stripe 100-0780 or 100-0580 hose. Sound right?

Thanks

[Sailmonkey]

I've been searching for anything 7/8" hose for about two years............good luck

[svlittlewing]

Sailmonkey - Trident 7/8" hardwall flexhose blue stripe etc .. part number 100-0780 at Defender etc. Trident Engine Intake Water & Heater Hose - 7/8 Inch

Has anyone found a way to reduce from 7/8 to 5/8"?

[Sailmonkey]

sorry, I meant hose barbs. I've been looking for hose barbs.

[Cheechako]

Will a 3/4 to 1/2 (inside measurements) copper solder type reducer connect those two hose sizes....(non marine item) is that what you need..... a hose to hose connector? Or do you need a threaded on one end...???

[svlittlewing]

Thanks Cheechako. Hose to hose - and that might do it. I had been toying with the idea of using a copper 1/2 nipple inside regular heater hose 5/8 - which has 7/8 OD, inside 7/8 ID. I'll look for a 3/4-1/2 reducer - should do the trick. Thanks! How long do you think the copper will last?

[Cheechako]

Not sure how long it should last, but copper should be good even in seawater. If not enough clamp length, you could solder together to make more length. I have used household copper in a pinch before. Not sure if they make fittings in type L (heavier wall) but if they do you might want to do that. The other option is to put a valve at the joint and a "thread to solder" adaptor on each side of the valve.... 1/2 one side and 3/4 on the other side....

[sanibel sailor]

Just out of curiosity, I searched McMaster, Grainger and Parker, eBay as well as a couple of smaller sites. Nothing for 7/8" barb at all. I suspect it is not manufactured. From my experience with them, it makes sense that Westerbeke would use that size.

[Sailmonkey]

Originally Posted by sanibel sailor

Just out of curiosity, I searched McMaster, Grainger and Parker, eBay as well as a couple of smaller sites. Nothing for 7/8" barb at all. I suspect it is not manufactured. From my experience with them, it makes sense that Westerbeke would use that size.

Welcome to my hell

[gonesail]

i used copper pipe to connect 5/8" heater hoses .. you really have to clamp it down tight .. but it has been working for 5 years.

[sanibel sailor]

http://www.mcmaster.com/pdf/119/0292.pdf

5/8 barb is readily available, not so much for 7/8

[cagney]

If I had your problem, on this side of the "pond", I would use a piece 22mm hydraulic pipe (even 316 grade if necessary). This is close enough to 7/8". I would then use a hydraulic crimper to crimo one end down to16 mm (5/8"). Then use a JIC coning tool in each end to create a slight cone, to make sure the hose clamps doesn't come off. Use a hacksaw to roughen the pipe where the hose clamps will be fitted, for good measure.
To make a general 7/8" hose fitting, use a German style 22L cutting ring fitting, to make a 7/8" hose to 3/4" BSP or NPT thread. Hose end done as above.
Your nearest friendly hydraulic shop may be able to help you!
Thomas

[forsailbyowner]

Goodyear rubber products in downtown saint petersburg has had anything Ive ever needed in the way of fittings and hoses of any type, it they dont have it nobody does.

[sanibel sailor]

There is a branch in Ft Myers as well. They sell Parker fittings. No 7/8" barbs in Parker catalog.