Ian...we are in the throes of replacing the 40-gal holding tank and sanitary hoses on our IP 380-88, The Belle of Virginia. We contacted several potential holding tank providers.
604.795.5106 in BC Canada) has the mold and has made several 3/8 poly holding tanks for the IP 380 and other IPs. Cost is $700 and $100 for shipping, about a week to build and ship.
, 561-586-0180 in Lake Worth, FL). Their price is $695, and 4-6 week build to ship time. They've provided many IP poly holding tanks.
Both the Dura-weld and the Wellington plastics tanks are 3/8" poly with a 3/8" protrusion on the tank face to hold the FNPT fitted access points, in the exact position detailed in the IP holding tank drawings. The tanks have baffles too.
). They have not made many IP holding tanks.
We start the sole surgery this weekend, opening the sole to remove the holding tank. Karen and I are doing all the work ourselves. Have done enough fiberglassing, hardwood floor replacement, and cabinetry work that we're well underway.
ON the hoses. Many of the new sanitary hoses are a bit (up to 1/8") wider in outside diameter than the original hoses, so it may not be a simple pull out the old and replace with a new hose...Time to use the dremel tool grinding head.
Chess and Karen
The Belle of Virginia