Join Date: Nov 2015
Location: Wrangell Island, Alaska
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Re: Holding Tanks with Urine only
One of our heads has a composter e.g., no flushwater for the urine. To prevent precipitates from forming [and odors] in the liquids jug [2.2 gallon; emptying every 5-10 days or so since part time use...] we add a ~1/2 teaspoon [after trial and error...] of Oxyclean laundry powder to the jug after emptying. [We use the 'free and clear'- non-perfumed version...]
Oxyclean works like a charm; No odors, scum, precipitates, or build-up. [These all absolutely do happen otherwise...]
I plan to plumb the composter to the unused holding tank for that head, and will continue this approach.
Our other head is a water flush, and can use fresh or raw water. As you mention, switch to fresh flush to eleminate more build-up in the plumbing. And [if urine only...] treat the tank with a bit of oxyclean to keep precipitates and odors at bay between pumpouts.
In case this is of interest.
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