1.5" Sanitation hose available

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Rafiki

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In an attempt to "improve the air quality" in the heads I'm about to replace all the sanitation hose and will order 16M of ID 38mm (1.5 inches) from ASAP. If anyone in Ipswich wants 14M of the same I could order a 30M coil and we could share the cost. 14 M would then be £77 ( including a contribution to carriage), or £5.50 a metre. ASAP part number is 507038 if you want to check sizes etc.
I'm also ordering 3/4" but my oder is no-where near a 30M coil. Order will be placed by lunchtime tomorrow.

Regards
 
onia,
I think the answer to the air quality is 16m of waste hose. If this is for one head it seems a trifle excessive. I believe there are two ways to preserve air quality, use the best quality hose you can get, I think Vetus do one otherwise Lee sanitation, secondly pump until your arm aches to flush the system through, even if it's just pee, so that nothing remains to degrade and start to permeate the hose.
Now I suppose you will tell me it's for two heads/holding tanks on an 75 footer, but my suggestions hold good whatever.
 
Onia
It is unlikely that changing the hoses will eliminate the 'rotten egg' whiffs that you are getting as this pong comes from the inlet water on the pump side. To test if it's the hoses giving the problem by allowing smell to permeate through you can easily check by wrapping a damp cloth around the pipe for 12/24 hours then removing it and smelling the cloth for the pong.
I would suggest you look at the Seasmart head treatment which is simply a small electric (P9 battery operated) pump that injects a does of disinfectant down your inlet flushing pipe. This treats the stagnant inlet water and kills the microbes that give off the pongs. Cost is around £120 and ASAP stock them. It will save you the hassle of changing pipes to be followed by disappointment.
 
I will be changing both inlet and outlet hoses. I've recently acquired this boat and some of the hoses are very old. Once changed I will ensure that the heads are properly pumped through and disinfectant added etc. This regime has worked very well indeed on the previous boat.
 
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I can only add my two-penneth based on experience......

On opening the boat up, virtually the the first job is to pump through the heads ( both of them) until the inlet water runs clear. At first, it is a grey colour and the smell is 'not nice'. Once this is done, and it takes well over 25 double strokes of the pumps. the smell has gone.

I think that a lot of people do not pump the heads enough after use, think about the length of the outlet pipe run and the pump stroke and work out how many pumps it takes to completely empty the pipe. I acknowledge that there will always be 'run back', but better it were clean seawater or as clean as it can be in NF marina :ambivalence:

The previous owner fitted a system that, I think, was based on a PBO article, where the inlet system can be filled with fresh water from the sink on leaving the boat, I have never had much success with it though.....

So I am definitely in the smelly inlet camp......
 
Boz said:
I can only add my two-penneth based on experience......

On opening the boat up, virtually the the first job is to pump through the heads ( both of them) until the inlet water runs clear. At first, it is a grey colour and the smell is 'not nice'. Once this is done, and it takes well over 25 double strokes of the pumps. the smell has gone.

I think that a lot of people do not pump the heads enough after use, think about the length of the outlet pipe run and the pump stroke and work out how many pumps it takes to completely empty the pipe. I acknowledge that there will always be 'run back', but better it were clean seawater or as clean as it can be in NF marina :ambivalence:

The previous owner fitted a system that, I think, was based on a PBO article, where the inlet system can be filled with fresh water from the sink on leaving the boat, I have never had much success with it though.....

So I am definitely in the smelly inlet camp......
Click to expand...
Check-out Headsmistress, its the inlet pipe that causes the smell
 
Has nobody else wondered at the requirement for 16m of 1.5" hose? That's a huge length! I'm about to redo the heads plumbing on Pagan including the fitting of a gravity holding tank and I've only ordered 2m of the stuff!
 
That's what I was getting at and making sure the system is well pumped through. I got over the smelly inlet problem with a Lee Sanitation treatment system (full one not the bottle type) fitted as close to the seacock as possible.
 
Well I was being a little bit generous on the measuring, it will be interesting to see how much I've got left over. The four lines ( waste in, pump out, gravity out and ventilation) for the holding tank add quite a lot. I didn't design this system, i'm just replacing the hoses.
Adding a smallish amount of cheap disinfectant to the last through on leaving the boat has done no harm to any seals in ten years on the previous boat.
Any way obviously know-one wanted to join in a bulk buying discount and I spent an (un)pleasant day yesterday working through replacement of about half the hoses. The rest will be done at the week-end . You never know I may have 2 or 3 metres left over to add to the 2 metres Bru ordered !
 
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