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I eased myself into plumbing by first buying a few Shark Bite fittings and valves (easy but costly push-together system) and replaced about 40 feet of steel pipe in the basement, but realized I couldn't do the whole job with Shark Bite or I'd add a couple hundred bucks on right there, so I sat down and watched, yet again, more YouTube "how to" videos and taught myself how to sweat copper pipes. Here's a partially-pictured list of the plumbing I had to re-do:
1. supply lines to outdoor faucet and washing machine; new valves for bathroom supply lines (I used pex pipe for this, works great)
2. washing machine faucet and sink hook-ups (see above, new PEX piping and a Sharkbite shut-off valve to replace the old, nearly bursting steel pipe, and then I used (much cheaper) copper for all the joints and valves for the sink and washing machine).
3. tapped into a gas line for our (used, old) gas dryer which required about 5 threaded fittings. For this, I had to buy a big, hefty pipe wrench, a tool I didn't understand prior to this job. I'm glad I didn't attempt it without a pipe wrench. I tested all the fittings with soap to look for bubbles.
4. drains for sink and tub
5. toilet supply line
6. new main valve for shower**
Once I got the new valves in the basement for the bathroom supply lines, I was able to shut them off and isolate the bathroom so I could tinker on it. Total time with the main water shut off for the whole project: only TWO hours!! **Number 6 was a huge test of patience and confidence. It involved some 15 plus sweated copper joints, one of which leaked when I tested the system, right at the connection to the new main valve. A slow drip, maybe once every 10 seconds, but enough to make me almost give up entirely. A simple YouTube search just wasn't helping this time. I should've called someone. Out of frustration and desperation, I cut through the pipe next to the leak, grabbed the pipe with my biggest set of pliers, and, to my surprise, was able to crush/muscle it out of its fitting without messing up the valve box nor the other joints on it. An hour later and 5 new sweated joints, and I was done with all of the plumbing - for now. I will probably replace the powder room's sink at some point, and I still have to run a line to the fridge which I've now learned is a simple $20, 1-2 hour task. (the previous owner I guess decided it wasn't worth it? to buy a new fridge with an ice machine and filtered water, but not hook it up??)
It's an empowering thing to realize I now understand and know the location of all of the plumbing and gas lines in the house, and am confident I could fix whatever problems may arise - it's the ACCESS to that problem that presents the biggest challenge, and identifying exactly what's leaking or failing because it's hidden can be a nightmare. I can't wait to live in a house that is plumbed entirely with PEX piping (like PVC but flexible and more durable) as many new houses are! My biggest worry: hoping the drains in the new bathroom will function fine despite having just about the minimum slope required (1/4" drop per 1 foot horizontal).
Next up: Construction - The Bathtub