Water Strainer

[silverdawn]

Hi All, I have a Vetus water strainer which I need to install the only area it will fit in with easy access is about 300mm above the waterline will this cause any problems regarding airlocks/siphoning etc. the model is the 330x 19mm. your advice would
be welcome, thank you.

 

[KenMcCulloch]

Hi All, I have a Vetus water strainer which I need to install the only area it will fit in with easy access is about 300mm above the waterline will this cause any problems regarding airlocks/siphoning etc. the model is the 330x 19mm. your advice would
be welcome, thank you.

I think Vetus actually recommend fitting above the waterline, because that allows blocked strainer to be cleared without closing the inlet seacock. A little washing-up liquid on the o-ring will enable you to get a good seal and if your pump is in good order it should draw water through quite easily.

 

[silverdawn]

Thanks Ken ,I was aware that it needed to go above the waterline but if I had the space I would have fitted it about 100mm above , my doubts were that 300mm is to high and this could have caused problems.

I think Vetus actually recommend fitting above the waterline, because that allows blocked strainer to be cleared without closing the inlet seacock. A little washing-up liquid on the o-ring will enable you to get a good seal and if your pump is in good order it should draw water through quite easily.

 

[VicS]

Vetus say a minimum of 15cm above the w/l measured to the bottom of the strainer body.

No mention of any maximum. A function of how high the water pump will draw the water to fill the strainer I'd think.

Clapped out pump in need of an overhaul might struggle. Likewise one that tends to loose its prime

 

[silverdawn]

Vetus say a minimum of 15cm above the w/l measured to the bottom of the strainer body.

No mention of any maximum. A function of how high the water pump will draw the water to fill the strainer I'd think.

Clapped out pump in need of an overhaul might struggle

Hi VicS, Just found website with installation drawings, as you say 150mm Minimum
above waterline no mention of any maximum so 300mm should be fine. thanks for the reply.

 

[Burnham Bob]

I used to have a vetus above the waterline and it was great. What I used to do at the start of every season was take the top off with the seacock closed and fill it with water. Then put the top on, open the seacock and start the engine. The syphon effect kept the filter and tubes full when the top was on, and that way the impellor never ran dry whilst the pump was sucking the first water through.

 

[johnalison]

My Vetus strainer is well over 300mm above the water, in fact, it's above the engine. this doesn't seem to be a problem.

 

[david_bagshaw]

I used to have a vetus above the waterline and it was great. What I used to do at the start of every season was take the top off with the seacock closed and fill it with water. Then put the top on, open the seacock and start the engine. The syphon effect kept the filter and tubes full when the top was on, and that way the impellor never ran dry whilst the pump was sucking the first water through.

On our smaller generator, with a vetus strainer above waterline, further to your point we have a small length of deck hose, about 1 inch dia standing 3/4 the height available, that fits into the outlet ring that locates the strainer. This enables the engine to be water primed with the lid removed, without closing the sea cock, useful laying up, and most importantly keeps water in the pump, when the engine stops even if the lid leaks air in a little, so enabling no problems with lack of prime etc on the next start.