Greywater

[nikwax]

or polyethelyne tanks

[cuyeda]

returning to freash water tanks for a moment, any experience with the ABS tanks

That looks like a Valterra tank. I have a 12 gallon installed in a TTT. Quote from web page: These ABS tanks keep your fresh water tasting fresh at all times. Black plastic eliminates the growth of algae, a main cause of musty smelling water. Designed for non-pressure applications, they are baffled for surge control and easily installed. ... end quote.

Depending on your installation, there are several places to screw threaded fittings. I wanted a larger water inlet to used for gravity feed (1.5" MPT), so I drilled a hole with a holesaw, and used PVC glue rated for potable water applications.

http://www.valterra.com/RV/rv-main.htm

[nikwax]

returning to freash water tanks for a moment, any experience with the ABS tanks

That looks like a Valterra tank. I have a 12 gallon installed in a TTT. Quote from web page: These ABS tanks keep your fresh water tasting fresh at all times. Black plastic eliminates the growth of algae, a main cause of musty smelling water. Designed for non-pressure applications, they are baffled for surge control and easily installed. ... end quote.

Depending on your installation, there are several places to screw threaded fittings. I wanted a larger water inlet to used for gravity feed (1.5" MPT), so I drilled a hole with a holesaw, and used PVC glue rated for potable water applications.

http://www.valterra.com/RV/rv-main.htm

thanks. so does it keep the water fresh tasting?