Have you thought of making a plywood tank and lining it with epoxy and
glass?. I made a water tank for my boat that way more than 30yrs ago, with
polyester resin since epoxy was not used for boatbuilding then. It is still
ok, but that tank is only about 9 gallons capacity. Dont see why it should
not scale up though. I lined the bottom and sides and flange round the top,
then lined under the lid, then screwed the lid down with epoxy still wet.
Plastic inspection hatch in lid. Can be DIY job and made to fit any space.
Particularly appropriate for wooden boat since it can form part of the
structure.

John

Has anyone got any experience of making their own water tanks? OR does
anyone know anyone in the bristol area that does PVC welding?

thanks in advance,

Jim Potter
Bristol

On Jul 15, 8:51*pm, "John Perry" wrote:
Have you thought of making a plywood tank and lining it with epoxy and
glass?. I made a water tank for my boat that way more than 30yrs ago, with
polyester resin since epoxy was not used for boatbuilding then. It is still
ok, but that tank is only about 9 gallons capacity. Dont see why it should
not scale up though. I lined the bottom and sides and flange round the top,
then lined under the lid, then screwed the lid down with epoxy still wet.
Plastic inspection hatch in lid. Can be DIY job and made to fit any space..
Particularly appropriate for wooden boat since it can form part of the
structure.

John



Has anyone got any experience of making their own water tanks? OR does
anyone know anyone in the bristol area that does PVC welding?

thanks in advance,

Jim Potter
Bristol- Hide quoted text -

- Show quoted text -

Hi all,
thanks for your wisdom - in no particular order:
- I'm not sure what its made of - its big and waxy and black and looks
a bit like some strips of PVC I havem but it could well be
polyethylene...
- I haven't yet looked at stainless - I'm doing a welding course in
the autumn, so 1 option is to sit tight until then and weld myself one
up...
- Wood and fibreglass? Not one I had thought of - I did think about
making a wooden/plastic structural container holding a bladder, but
didn't see anyone else using anything like this.

thanks again for your help,

Jim Potter

A friend of mine and I did exactly that. We built a very odd shaped plywood
(15mm) tank of about 200 liters (appr. 50 gallon). We inserted a few
bulkheads for structural strength, put fillets in all corners and painted
the inside with special epoxy paint for fresh water tanks. We used no glass.
The top is removable and sealed with rubber.

Meindert

"John Perry" wrote in message
...
Have you thought of making a plywood tank and lining it with epoxy and
glass?. I made a water tank for my boat that way more than 30yrs ago, with
polyester resin since epoxy was not used for boatbuilding then. It is
still
ok, but that tank is only about 9 gallons capacity. Dont see why it should
not scale up though. I lined the bottom and sides and flange round the
top,
then lined under the lid, then screwed the lid down with epoxy still wet.
Plastic inspection hatch in lid. Can be DIY job and made to fit any space.
Particularly appropriate for wooden boat since it can form part of the
structure.

John

Has anyone got any experience of making their own water tanks? OR does
anyone know anyone in the bristol area that does PVC welding?

thanks in advance,

Jim Potter
Bristol

On Fri, 18 Jul 2008 12:23:55 +0200, "Meindert Sprang"
wrote:


Has anyone got any experience of making their own water tanks? OR does
anyone know anyone in the bristol area that does PVC welding?

thanks in advance,

Jim Potter
Bristol




Made two 27 Imperial gallons (121 litres) from plywood glassed over
with standard epoxy resin. The best ply to use is cheap construction
ply as the glass adheres better. I divided my tanks into two connected
compartments with a divider/baffle to prevent the sloshing and force
of a large volume of water. Nailed the top down over thickened resin
and glassed over the join quite heavily.

No problems so far.

cheers
Peter

On Jul 18, 11:23*am, "Meindert Sprang"
wrote:
A friend of mine and I did exactly that. We built a very odd shaped plywood
(15mm) tank of about 200 liters (appr. 50 gallon). We inserted a few
bulkheads for structural strength, put fillets in all corners and painted
the inside with special epoxy paint for fresh water tanks. We used no glass.
The top is removable and sealed with rubber.

I’ve been toying with the idea of making water tanks for my boat but
was dubious about using epoxy as a lining. I didn’t think it would be
safe enough for drinking water.
So what is this paint you have used?
Is it safe to drink the water ?
Does it affect the taste of the water?

Mike.

"timmynocky" wrote in message
...

I’ve been toying with the idea of making water tanks for my boat but
was dubious about using epoxy as a lining. I didn’t think it would be
safe enough for drinking water.

Like I said: epoxy paint for water tanks. Special stuff that doesn't contain
any solvents.
For instance SikaGard, a High Build epoxy coating. This system is a
two-component solvent free, high build coloured epoxy resin coating with
high chemical resistance, and approved for use in contact with
potable(Drinking) water.

Meindert

Meindert Sprang wrote:
"timmynocky" wrote in message
...

I’ve been toying with the idea of making water tanks for my boat but
was dubious about using epoxy as a lining. I didn’t think it would be
safe enough for drinking water.

Like I said: epoxy paint for water tanks. Special stuff that doesn't contain
any solvents.
For instance SikaGard, a High Build epoxy coating. This system is a
two-component solvent free, high build coloured epoxy resin coating with
high chemical resistance, and approved for use in contact with
potable(Drinking) water.

Meindert


-----------------

drinking water approvals - called NSF61 - are generally tested
only on tanks over 1000 gallons. So, if your tanks are under 1000
you probably cannot find an NSF61 approved, potable water epoxy.

paul oman
progressive epoxy polymers inc

On Sat, 02 Aug 2008 20:46:00 -0400, Paul Oman
wrote:

Meindert Sprang wrote:
"timmynocky" wrote in message
...

I’ve been toying with the idea of making water tanks for my boat but
was dubious about using epoxy as a lining. I didn’t think it would be
safe enough for drinking water.

Like I said: epoxy paint for water tanks. Special stuff that doesn't contain
any solvents.
For instance SikaGard, a High Build epoxy coating. This system is a
two-component solvent free, high build coloured epoxy resin coating with
high chemical resistance, and approved for use in contact with
potable(Drinking) water.

Meindert


-----------------

drinking water approvals - called NSF61 - are generally tested
only on tanks over 1000 gallons. So, if your tanks are under 1000
you probably cannot find an NSF61 approved, potable water epoxy.

paul oman
progressive epoxy polymers inc

Believe me, I am not trying to be combative but it seems to be "common
knowledge" that one coats the inside of fuel and water tanks with a
final coat of "epoxy" to make them water/fuel proof.

Now, obviously "common knowledge" is not always (heck sometimes never)
correct but could you discourse a bit on sealing tanks with epoxy, if
that is a viable scheme?

Bruce-in-Bangkok
(correct Address is bpaige125atgmaildotcom)