You show up to a service call. Customer says "water under the kitchen sink." You walk in, pull the cabinet doors open, and there's standing water on the cabinet floor. Not dripping — sitting. What do you do first? A lot of guys go straight for the wrench. Don't. Your first move every time is to figure out if the water is STILL coming or if this is leftover. Reach in with a paper towel and wipe an area dry. Wait 30 seconds. Does water reappear? If yes — you've still got active pressure somewhere. If no — the leak already sealed itself and you're dealing with residual. That one step tells you exactly what you're walking into. Active leak means shut-off valve trip first. Residual means you can take your time diagnosing. When you walk into a water-damage call, what's the first thing you check?

Before you leave any service call — water heater, faucet, toilet, whatever — take 10 minutes and run all three fixtures in that bathroom. Sink hot and cold. Tub/shower. Toilet flush. Why? Because you might've knocked something loose during the job. A little piece of sediment, a worn washer, a fleck of solder. It doesn't show up on the fixture you worked on. It shows up in the tub two hours after you left. I started doing this after a callback where a customer said "the shower won't shut off" after I replaced their kitchen faucet. I didn't touch the shower. But something got rattled loose in the pipes. Ten minutes. Run everything. Save the callback. What's one habit you picked up that cut your callbacks in half? Drop it below. 👇

You swap a 50-gallon water heater in a basement. Old one's out, new one's sitting in the dolly. Then you see it — a water stain spreading from under where the old tank sat. You push the new one aside. The floor's soft. Particle board, not concrete. You could set the new tank on it and leave, but you know it'll sag in 6 months, maybe crack a fitting and flood the place.\n\nDo you finish the swap and warn the homeowner? Call and wait for approval? Or eat the time and fix the floor yourself?\n\nI've made all three choices. Two of them cost me money. One of them built a customer for life.\n\nWhat do you do? Drop your move below. 👇

A shower that won't turn off usually means a bad cartridge. But before you start pulling trim plates and trying to find the manufacturer, try this: Turn the water off at the stops (if it has them). If it doesn't have stops, kill the whole house. Pull the handle and trim, then put a towel under the valve body. Take a flathead and gently pry the clip out. Here's the trick: spray some CLR or white vinegar around the cartridge body where it meets the valve. Wait 5 minutes. That mineral buildup is what makes cartridges seize up. 9 times out of 10, that soak turns a 30-minute fight into a 5-minute swap. Question: What's your go-to trick when a cartridge is seized? Drop it below.

You get a call: sump pump running nonstop, basement not flooding yet but the homeowner is nervous. You get there, check the pit — water isn't rising. You pull the pump, find a small rock lodged in the float housing. Clear it out, float moves free. Plug it back in. Pump cycles once, then stays on. Won't shut off. You checked the discharge line — clear. Check valve — working. Float — moving free. What's your next move? What's your diagnosis? Drop your best guess in the comments.