Piddle in pipes... the chemistry please.

[Bobobolinsky]

As a presently professional toilet cleaner , we use Jangro toilet descaler in the urinals and diluted to remove scale on taps and basins. It's HCL base mostly, but has a fragrance of wintergreen added, which I find a little nauseating, due to memories of school changing rooms in winter

 

[nigelmercier]

As a presently professional toilet cleaner , we use Jangro toilet descaler in the urinals and diluted to remove scale on taps and basins. It's HCL base mostly, but has a fragrance of wintergreen added, which I find a little nauseating, due to memories of school changing rooms in winter

I love wintergreen, it takes me back to when I was a kid and went slot-car racing (for the tyres).

 

[Caer Urfa]

No!
If the toilet is installed below the ( heeled) water line vented antisyphon loops are recommended in the inlet and outlet plumbing.

The inlet antisyphon loop replaces the short connection, supplied with the toilet, between the pump and the bowl.
If a vented loop is fitted between the inlet seacock and the pump you will simply suck air into the loop via the valve when you attempt to pump.

You will find this described in the installation instructions.

Are you sure VicS

I am on your side and have anti syphon loops fitted both inlet and outlet, BUT, on the 'Jabsco Vented loops' details page 3 item 4 says :-

Quote: Do NOT fit a vented loop into the inlet pipework of the pump, where it will admit air (as it is designed to) and will impede or prevent priming. unquote.

My toilet is below water level and I currently have the above fitted and it has worked for the past 3 years no problem, but yesterday the pump piston will not move, I stripped the pump today and found nothing that looks blocked or worn and was thinking 'is it because I have fitted a anti syphon loop to the inlet pipework!

Now I am really confused!!
Mike

 

[VicS]

Are you sure VicS

I am on your side and have anti syphon loops fitted both inlet and outlet, BUT, on the 'Jabsco Vented loops' details page 3 item 4 says :-

Quote: Do NOT fit a vented loop into the inlet pipework of the pump, where it will admit air (as it is designed to) and will impede or prevent priming. unquote.

My toilet is below water level and I currently have the above fitted and it has worked for the past 3 years no problem, but yesterday the pump piston will not move, I stripped the pump today and found nothing that looks blocked or worn and was thinking 'is it because I have fitted a anti syphon loop to the inlet pipework!

Now I am really confused!!
Mike

There you have it in black and white.

If the vented loop is fitted is fitted between the inlet seacock and the pump you will suck air in via the vent valve, if it is working, with the result that you will get a much reduced volume of flushing water drawn in, if any at all.
It wont cause the pump to seize or even become stiff.

If you have a vented loop in that position and you can flush the toilet Ok I'd suggest that the vent valve is stuck or blocked.

 

[Caer Urfa]

There you have it in black and white.

If the vented loop is fitted is fitted between the inlet seacock and the pump you will suck air in via the vent valve, if it is working, with the result that you will get a much reduced volume of flushing water drawn in, if any at all.
It wont cause the pump to seize or even become stiff.

If you have a vented loop in that position and you can flush the toilet Ok I'd suggest that the vent valve is stuck or blocked.

Hi VicS

Now there you may have hit the nail on the head! will check and try..

Mike

 

[nigelmercier]

FWIW, I don't have any vented loops, and the only loops are on the outlets. Never had a problem.

 

[VicS]

FWIW, I don't have any vented loops, and the only loops are on the outlets. Never had a problem.

If your toilet is below the WL you rely on people closing seacocks, the twist n lock facility and the joker valve on the outlet ?

Does the "twist n lock" lock the inlet shut as well as the outlet ?

Or do you have a far superior toilet ?

 

[nigelmercier]

If your toilet is below the WL you rely on people closing seacocks, the twist n lock facility and the joker valve on the outlet ?

The WL is about half way up the bowl.

Two Jabsco electric conversions, one twist n lock. We never close the seacocks when we are on the boat, even with the old Jabsco units. When fully heeled, we get perhaps 500ml backflow in the leeward side. The top of the outlet vent is still above the WL.

 

[Rivers & creeks]

Are you sure VicS

I am on your side and have anti syphon loops fitted both inlet and outlet, BUT, on the 'Jabsco Vented loops' details page 3 item 4 says :-

Quote: Do NOT fit a vented loop into the inlet pipework of the pump, where it will admit air (as it is designed to) and will impede or prevent priming. unquote.

My toilet is below water level and I currently have the above fitted and it has worked for the past 3 years no problem, but yesterday the pump piston will not move, I stripped the pump today and found nothing that looks blocked or worn and was thinking 'is it because I have fitted a anti syphon loop to the inlet pipework!

Now I am really confused!!
Mike

Mike - you don't put a vented loop on the inlet hose until after the loo. Think for a mo, you're protecting yourself from water syphoning if the all the valves on the loo get stuck open, so all you need is a ventilated loop after the pump and before the loo to sort it.