Tirals with differnt arrangements. Pvc pipe chamber and also sida bittles.
1.25" pvc pump. I know its oversize but couldnt get smallar size o rings around.
It fills two half litre soda bottles in 10 pumps.
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Tried making it with gv steel pipes. Its quick as dont hv to wait for cementing. Used bicycle pump. Firstly plastic bottle brust at 7 full pump. Very strong pump. Used second check valve at tail to use as a lid to fill the platic bottles. Pressurised the second platic bottle tank to get more range. ...