With the floorboards finally all lifted up, it was time to tackle the plumbing for the heating system. The catalyst for all this was a very slow leak in the central system, meaning I would have to keep topping it up in the winter to maintain pressure. Livable, but not great. And once the floor is down, it's never coming up again. So best to fix the problem once and for all.
The big issue was that I had no idea where the leak was. I figured that it had to be on the ground floor as I would have been able to see a drip coming through the ceiling (water stains). Still there is a lot of pipe to cover to try and find it. Also, some was copper and some was replaced with plastic when we redid the radiators. I'm more of a copper man myself.
So, off I went in the search for the drip.
The tools for this one. A new pipe bender (fun), lots of copper pipe and lots of fittings. The reason for the bender was twofold 1) bends are much better for flow of water vs. fittings and 2) if my soldering is not up to scratch, less fittings mean lower chance of failure.
And after watching endless YouTube clips on how to bend pipe - some way more scientific than they need to be - I had a go at my first bend a 90 degree one. It ended up looking OK. Not to be outdone, I decided to go next for 45 degree offsets (bottom pipe). This also went well.
Now that I'd done a couple - I was declaring myself the pipe bending master. So that means I would of course try the worlds most complicated bent pipe run. This had to go over a joist, bend 90 degrees, then under a joist and then up the hallway radiator. No probs. Finished product below.
Next, I wanted to switch out the old valves in the dining room for modern thermostatic ones. A bit strange, that the rad looked fairly new but the valves looked like they came from the first Model T.
So, I drained the system and isolated the radiator before taking it off the wall. The old valves were 3/4" vs. 15mm for the new ones, so the rad tails also needed to be changed (which is why it took it off the wall).
The pipes underneath looked OK, but there was a massive kink in one of the nuts for the old fitting. I initially through I'd just re-use them but instead had to cut the pipe and olive and reinstall it. I was surprised how that fitting managed to not leak given how bad it was.
The new valves looked and worked great. And I managed to only get myself a little wet in the process. I'll call that a win.
Finally for the most complicated of the lot. This was the feed coming into the living room and had the great complication of lots of pipe in very little space. Add to that, as I wanted to keep the rest of the system pressurised while I was working I had basically double the pipe to deal with.
First step was to run all the copper pipe. Difficult as this was under the joists and tricky to navigate 2m lengths around.
Once this was in place and cut to size, then came out the fittings. Lots of elbows and T's. You can see how little room I had to navigate here. But basically I took each fitting in turn, starting with the bottom ones and working my way up. The key to a good solder joint is cleanliness, so I took care to clean off each pipe/fitting and applied lots of flux. Happy with the result - an not setting the house on fire in the process.
Once I was happy with the fittings, it was time to drain the system, connect the last bit and go for the pressure test. And ... NO LEAKS! I was pretty happy with myself at this point and took a well earned beer (or three).
After the system was filled with water, I had to add some inhibitor. This keeps the water getting all gunky and rusting through the rads. Now the challenge was how to get it into the system. Basically, I was going to buy the ready-made filling system from Amazon - but they ran out of stock. So I took a queue from one of my favourite plumbing sites (
https://www.youtube.com/watch?v=5nmCkxjZoPc) and MacGyver'd one myself. So drained the system down a bit, cracked the nut on the radiator and used my Buxton water bottle filled with inhibitor.
Finally, after spending 45 minutes doing all the plumbing (yeah right) it came down the last step, wrapping the pipe up. This was to keep it efficient and ensure that all the heat in was going to the radiators not heating the void under the floor.
Now with all that nonsense taken care of, it was finally time to get down to the flooring. Joan and Rene are coming in a few weeks and Carolyn seems fairly enthused about looking at all the great fitting joints - might have something to do with the lack of floor in the house.
Oh and in case you wondered... I did finally find the leak. It was a hidden drain down valve at the front hallway radiator, beneath the floor. I can't say it was the best place for putting one of these. But from visual inspection, you could see the calcium buildup around the threads so it obviously had been the culprit. Leak fixed.