The Thomas 5078s/5080s/5100s/5120s rebuild kit is the standard Thomas factory kit to replace diaphragms on the following Thomas Models-5078s, 5080s, 5100s, and 5120s.
The Rebuild kit includes: 2-diaphragms and mounting blocks, and 2-heads w/air valves, and an air filter, 2-L tubes, Base gasket, and filter gasket.
Note: No Returns on items over 30 days.
Alan Niemi (verified owner) –
works good and easy install.