I use a converted gardiner backpack with chemical pump fitted right now which obv is not ideal but until i can upgrade i want to make it safe and useable. Thepump and battery are great - its the delviery from the backback to the nozzle that is casuing issues. These rectus fittings are not doing it right - constant problems with them degrading and blocking (had one blow out in front of me and eye full of chems recently ) - need something solid ideally push fit but open to suggestions. Any recommendations - thanks in advance