Werner
Member
We have purchased a 1981 Defever 41. First job is to replace a old, permeated waste system. The holding tank and all hoses have now been removed. (Wish I was 30 years younger and 2 ft shorter due to the tight spots to get into to do this job) So now its back to the bilges to run the new hose. My question is about the hoses that attach to the heads.
Both heads are plumbed to a holding tank, with no direct discharge. The holding tank has a macerator pump to pump overboard where allowed, and a deck pumpout for use at marinas.
One toilet is a manual with a short run and uses 1 1/2 hose. No issues with that toilet. The other is a electric whose hose starts from the macerator at the toilet with a one inch hose, which then goes into a 1 1/2 inch hose and on to the holding tank. This run is quite long (12 ft) and when I removed the old hose it had closed down to a opening of roughly 1/2 to 3/4 inch.
Would it not be better to run the hose from the toilet macerator all the way to the tank using hose that is the same diameter, which would mean a 1 inch line. My thinking is that the macerator pump would lose pressure as the waste moves from the one inch to the 1 1/2 inch hose. If it was all the same it would move the waste better I would think. The waste in the hose does need to be pushed uphill during the last few feet to get into the top of the holding tank.
Both heads are plumbed to a holding tank, with no direct discharge. The holding tank has a macerator pump to pump overboard where allowed, and a deck pumpout for use at marinas.
One toilet is a manual with a short run and uses 1 1/2 hose. No issues with that toilet. The other is a electric whose hose starts from the macerator at the toilet with a one inch hose, which then goes into a 1 1/2 inch hose and on to the holding tank. This run is quite long (12 ft) and when I removed the old hose it had closed down to a opening of roughly 1/2 to 3/4 inch.
Would it not be better to run the hose from the toilet macerator all the way to the tank using hose that is the same diameter, which would mean a 1 inch line. My thinking is that the macerator pump would lose pressure as the waste moves from the one inch to the 1 1/2 inch hose. If it was all the same it would move the waste better I would think. The waste in the hose does need to be pushed uphill during the last few feet to get into the top of the holding tank.