I’ll probably catch hell for this – but what the hell – the use of three tanks should be a benefit, not a concern. provided they’re properly joined. – like most things – more can be better, and redundancy is always good. i should think that adding a 3rd tank to a rig would actually effectively “share the load and lengthen the overall time the combined tank system produces the necessary flow rate … in other words to achieve the required flow rate you would have to open the valves of two tanks further so they would run out quicker – with 3 tanks the valves should be able to be opened less making the total output take longer but stable.

that said – you haven’t really given a real reason for your choice other than you’ve tried and failed several times – you’ve got everything you need – it can’t hurt to stick around and see if someone here can’t help you find an alternative – I got to imagine that although your elderly folks will “get on ok” just fine, it will REaLLY crush them to their core.

info dawg