Alternative to Grocco Sender & TLM

[ttles714]

MARLIN 300, 2001..... Short story.... I needed to replace the Holding tank sender and the TLM. ... They are out of there minds with the price of replacement parts !!! Here's what I did. From Wema (in Fortlauderdale FLA.> > WEMAUSA.Com ) I ordered a new sender and holding tank gauge. From the boat wiring store I ordered 2 momentary rocker switches and a "2 Gauge 2 switch panel".( boatwiringstore.com).... I easily cut off the section for the extra gauge. ......I installed the new sender into the threaded opening in the tank, and mounted the switches and the gauge with the new plate in the same location where the TLM was. .... I Needed to cut a little with a hole saw.... I used the original wiring from the sender to the gauge and added one additional wire for for the positive side of the gauge. One switch shows a level reading when depressed. The other activates the pump motor. ... It works well and looks good. Total cost was about $ 100.

 

[ttles714]

Re: Alternative to Grocco Sender & TLM // NOW the PUMP

I have finally had it with the Grocco in tank pump system that came with this Grady. I removed the Grocco pump from the top mounting plate and re-installed the plate to the tank. There was an extra 1 1/2 " threaded plug in the top of the tank. I removed that and installed an 1 &1/2 " Male thread 90 degree hose adapter. On the inside of this fitting I fit and epoxied (JB Weld) a 10" long, inch and a 1/4 PVC pipe to reach about 3/8" off the bottom of the tank. I mounded a Jabsco Macerator pump just forward of the tank and in the port side compartment. ( all under the aft berth)... I wound up mounting the pump horizontally and from starboard to port, on a 12" piece of 2x6 lumber secured with 2 brackets to the 2x4 that makes up the tank compartment. A picture is worth 1000 words, I will work on that.
Used the following ... 2' of inch and half sanitation hose.. 1& 1/2 '' male 90 degree hose adapter ( for tank) ... 1&1/2'' female 90 degree hose adapter( for input side of pump.).... 3/4' by 1" "I" hose connect fitting (connects the 1'' pump output to the 3/4'' Grady discharge hose.) ... 2'' of 1'' id hose to connect the 1'' side of the adapter to the 1" pump output.... SS clamps..

So now the only thing original with this set up is the tank.