The usual way is to put an inch or so of the correct 1 3/8" hose on the
fitting then put the 1 1/2" hose over that, clamp as usual.

Wouldn't it be simpler--and a more reliable fix--to just replace the
fitting with one that's the correct size?


Just for form & I accept you will never ever be interested Lloyd
but............. get rid of the toilet pump completely (just screw a
stainless or even placky plate over where it bolts to the base & take the
waste out the other end which has a standard screw pipe fitting plug in it),
it's just about the worst design possible & unhealthy to boot (that small
amount of water that come out each time you push down?? it's polluted by the
leakage past the piston, wash your hands properly "every" time!!!!!!)

Use a small cheap 1 " bilge pump for the inlet, you can really get some
water flowing for a good flush.

Use a separate bigger 1 1/2 inch bilge pump for the outlet.

Again...wouldn't it be simpler to buy a decent quality toilet that won't
leak and flush it enough to rinse the waste out of the hoses? A cheap
bilge pump isn't likely to be much more durable or reliable than a cheap
toilet and is no more fun to clean out.

How do you propose avoiding any engine maintenance? Replace it with oars?

Peggie
----------
Peggie Hall
Specializing in marine sanitation since 1987
Author "Get Rid of Boat Odors - A Guide To Marine Sanitation Systems and
Other Sources of Aggravation and Odor"
http://www.seaworthy.com/html/get_ri...oat_odors.html







Put both on the wall so they're easy to operate & clean.

It will never smell, will last years & years & in the highly unlikely
event someone does manage to block it??? most bilge pumps have an "O" ringed
screw on face that makes the cleanup much more manageable into a bucket, if
still not exactly pleasant:-)

The toilet spruikers go on & on about buying their ripoff priced
"special" hoses etc etc etc but seem to be in denial that most marine heads
have no more than an "O" ring piston running in a placky bore between the
waste side & the water inlet side & from there to the boat's cabin, which is
where the real smell emanates. Even the cheapest hoses will last years if
you use plenty of water to flush; which with the bilge pump system you will
easily.

Regards,

K