28.5mm to 32mm hose connector

MikeBz said:

I need to join a 28.5mm (or 1+1/8”) ID hose to a 32mm (1+1/4”) ID hose on the raw water intake side of an engine. The only product I can find is this: Stepped Hose Adaptor (13mm to 38mm). I asked ASAP and that was their recommendation, so it ought to be good enough. It just seems a bit hard to spend £20 on a bit of plastic and cut off/discard most of it. Trudesign do a range of unequal connectors but nothing in between 25 and 32mm. With a bit of bronze bar or tube of the right diameter I could get one turned up, but sourcing that in a very small quantity doesn’t look easy. Aluminium would be easy but unanodised I suspect it wouldn’t last long. Any suggestions before I just buy that stepped plastic connector?

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Alex_Blackwood said:

Have a look here.
35mm > 32mm Silicone Reducer Hose Coupler Intercooler Tube Blue

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penberth3 said:

Check the first post, I think you're missing something.

The OP wants to join two hoses, that needs a metal or plastics fitting. something rigid. The coupler you've shown is for joining metal pipe to metal pipe or spigot.

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Fr J Hackett said:

Any reducer will further restrict the flow of water which might be important in relation to the engines cooling.

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Fr J Hackett said:

Any reducer will further restrict the flow of water which might be important in relation to the engines cooling.

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penberth3 said:

Good point. The 28mm copper idea would minimise that, assuming the copper is compatible with the antifreeze.

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MikeBz said:

So I’m decided: 1” BSP skin fitting/ball valve, 32mm hosetail, 32mm inlet & outlet on the strainer, raw water pump has ~28.5mm inlet (which is part of the pump casting and cannot be changed). So with a tapered silicon hose on the pump, 28.5mm at the pump end, 32mm at the other end connected to the pipe from the strainer by a straight connector, the smallest diameter is the inlet to the pump itself. Thanks to @Alex_Blackwood for putting me on that route!

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