I am looking to buy from my neighbor, hooked up hose with muff plenty of water everywhere except pee tube. disconnected muffs and connected hose to flush fitting same results .I inserted a piece of weed eater line back to the thru pee hose to metal housing still nothing what should I look at. Neighbor showed me video dated earlier this week flushing thru fitting all working fine. No funds have changed hands ,would like to fix issue and continue with the sale any suggestions. Thanks

