Cleaning gray water tanks

Submitted: Wednesday, Mar 18, 2009 at 19:00
ThreadID: 66953 Views:2482 Replies:5 FollowUps:3
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Our motorhome has an inaccessible modest size grey water tank located on the vehicle centreline with an outlet hose and hose-end valve under the edge of the motorhome.
This tank "serves" the kitchen sink and the tank plugs up with gunge - I know, dont put muck down the sink hole - but it stinks like a grease trap. Guess what, it is a grease trap ! So any suggestions please apart from 'Drano' = caustic soda, for cleaning out the tank.
There is no access to the tank - clever motorhome builder !

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Reply By: Neil & Pauline - Wednesday, Mar 18, 2009 at 19:19

Wednesday, Mar 18, 2009 at 19:19
Put a few table spoons of BiCarb Soda. Does the trick for us.

Neil
AnswerID: 354753

Reply By: Lotzi - Wednesday, Mar 18, 2009 at 19:52

Wednesday, Mar 18, 2009 at 19:52
G'day Martin

If you have a swimming pool or a friend has, drain the tank and pour about 10 to 20 litres of the chlorinated water down the sink or toilet, go for a drive, leave it overnight or so, then drain it.... may do the trick for odour, that's what I did in the touring coaches. White King mix can also work.

Cheers
Lotzi
AnswerID: 354757

Reply By: rocco2010 - Wednesday, Mar 18, 2009 at 21:13

Wednesday, Mar 18, 2009 at 21:13
Martin,

Try neat Domestos. I have used it on slow drains at home and reckon it is better than drano etc. If it is badly blocked, might need a few goes, Thereafter one slurp a month should keep it clean

Cheers

Rocco
AnswerID: 354771

Reply By: Motherhen - Wednesday, Mar 18, 2009 at 22:17

Wednesday, Mar 18, 2009 at 22:17
We don't have a grey water tank, but when the blockages and odour are from fat (as they most likely are), surely bi-carb or bleach would not deal with the fat?

Motherhen
Motherhen

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AnswerID: 354783

Follow Up By: Member No 1- Thursday, Mar 19, 2009 at 07:57

Thursday, Mar 19, 2009 at 07:57
you need heat to get rid of the fat
as you say Motherhen and if fat is the issue, i dont think cold solutions would work either
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FollowupID: 622916

Reply By: LGen1 - Wednesday, Mar 18, 2009 at 23:11

Wednesday, Mar 18, 2009 at 23:11
Napy san
AnswerID: 354793

Follow Up By: Bushed-Tracker - Thursday, Mar 19, 2009 at 15:44

Thursday, Mar 19, 2009 at 15:44
I agree - any Nappi San 'home-brand' variety will do the trick. Sodium Percarbonate at 24 to 34% is the critical ingrediant. Two heaped tablespoonful well mixed in warm water and then fill the tank. Let it stand for 24 hrs and flush.

This is an excellent general cleaning agent and also works brilliantly in loo cassette. For the latter we use only one full tablespoonful in one litre warm water water and empty every three days.

Plus , it is a cheap as chips at about $4.00 per Kg and is environmentally safe and can be disposed of in septic tanks.

B-T
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FollowupID: 622996

Follow Up By: Rolly - Friday, Mar 20, 2009 at 16:50

Friday, Mar 20, 2009 at 16:50
Good stuff, innit?
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FollowupID: 623219

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