The time has come to replace the bladder type holding tank (for the toilet waster). The air breather tube has parted company with the bladder. Can anyone recommend a supplier of bladder type or solid type holding tanks in Sydney?

Have fun,
I am also looking at a new (rigid, not bladder) holding tank.

I have pricing from the following.

Wrengco in Sydney were the lower cost for a custom tank. (www.wrengcotanks.com.au)

Saniloo, were more expensive for the custom, but have a standard range which are cheaper. (www.sani-loo.com.au). I am struggling for space and could not find a standard model that fits.

I will be ordering in the next week, so cannot comment on quality yet.

LMY, which company did you choose and how did you go about the shape of the bottom of the tank so it fits the curve of the boat?

As Coolrunnings has mentioned there is Atlas tanks. I have used one of their options for my water tank and service and quality was good. they have an extensive range of standard shapes/sizes but will also do custom jobs.

HaveFun said..
LMY, which company did you choose and how did you go about the shape of the bottom of the tank so it fits the curve of the boat?

The costs for the custom tank (approx 50 litre) were $410 from Wrengco. Saniloo was WAY above that. Similar size standard tanks from Saniloo were about $250.

I need the custom tank so will go with Wrengco and will order in the next day or so. Delivery is around two weeks, if you can wait that long I will post when I see the quality.

I want to have the option of gravity drain from the tank to through hull. The through hull is in a cupboard, so I am locating the tank high in the cupboard and do not need to shape the tank to the hull.

Making the tank yourself is probably feasible. The commercial tanks are around 10mm thick so it would be interesting to see how much money would actually save, especially if you went the epoxy resin route. For me I would rather spent the money to buy the tank and the time on one of the other 10,000 outstanding jobs.

Out of interest, did you have odour issues with the bladder tank. There is lots of information that suggests that smell is reduced if there is oxygen available to the decomposition process. I assume there is no air above the stuff in the bladder tank, so is there lots of smell?

I went with an atlas 60 lt holding tank , can put inlet /out lets where ever you need .