In this video I’m back in Washington working side-by-side with my tech friend Kylen from Ace RV, and we’re doing real-world troubleshooting on a tiny house plumbing setup. The customer had two complaints: the water pump was leaking, and the tankless water heater would make the bathroom hot but couldn’t keep consistent heat at the kitchen. This is exactly the kind of job that makes you better—because you’re solving it in real time, in tight spaces, with whatever the system gives you (and tiny houses don’t follow RV standards). First, we tackled the leak. There was no low-point drain, so we used a bucket workaround to get the system drained enough to work. Then we tore out the “against-the-grain” pump layout that had too many elbows and unnecessary plumbing, reconfigured the PEX runs, and I walked through the basics of clean cuts, proper crimp placement, and why PEX crimping is not for the weak (hand strength matters). I also showed how I do thread tape—face the fitting toward me and wrap clockwise so it doesn’t unravel. We fixed the pump and confirmed no leaks, but the tankless issue is still the mystery. The kitchen flow/pressure is lower and the heater fires on/off, causing wild temperature swings. Kylen’s next steps are trying a variable-speed diaphragm pump and, if needed, adding an accumulator to stabilize flow—because tankless heaters need consistent flow to stay lit.