Washing Powder In The Holding Tank

[jfm]

do many people use these devices?

I do Hurric. It's a proper softener, not merely a filter. It has an ion-exchange resin that chemically removes the calcium, as in a house water-softener. You have to recharge the ion-exchange piece, or replace with new, every month or two. It cost about euros300 and fits in line in the dock hose, so the boat's water tank always has softened water in it and washdowns are done with softened water too.

 

[AndieMac]

Thanks for info jfm, hopefully a solution to an annoying problem.

With regards to the switched over vent hose - deck mounted, pump-out hose issue, instead of the vent running from the top of the holding tank directly (via the filter) to the outside air, it ran to the sealed under-side of the deck mounted pump-out fitting. The tank could never breath properly.

The actual air-vent fitting, on the gunwhale, was attached to the hose running to the lowest point (pick-up) of the holding tank, again not being able to breath.

I guess only being used as an occasional day boat by previous owner, didn't bring the issue to a head, so to speak

 

[jfm]

With regards to the switched over vent hose - deck mounted, pump-out hose issue, instead of the vent running from the top of the holding tank directly (via the filter) to the outside air, it ran to the sealed under-side of the deck mounted pump-out fitting. The tank could never breath properly.

The actual air-vent fitting, on the gunwhale, was attached to the hose running to the lowest point (pick-up) of the holding tank, again not being able to breath.

Ah, I get your point, doh. Sorry, I was being thick in my earlier post. Of course the pump out picks up from bottom of tank whereas vent connects to top of tank, so mixing them up would indeed matter, as you said

 

[AndieMac]

It would 'burp' back through the toilet in the stb. cabin

Quite keen to try the washing powder thing though, thanks..

Good luck with the leg....