SharkBite　U870W100 PEX配管、0.75インチ x 100フィート 50-Foot U870W50 1

I'm not a plumber. I was replacing a crappy Bosch tankless hot water heater in my basement with a new Navien NR 180 A tankless. Originally I planned on just using the existing plumbing. It would have fit fine and taken me less than a couple of hours to install, but that plumbing had some serious design flaws. Like I said I am no plumber, but common sense tells me a pipe shouldn't branch off the main water line at a 90 degree elbow pass over the heater on the hot water outlet side turn 90 degrees to go 3 inches to the middle of the heater then turn 90 degrees to go to the bottom of the heater then turn 90 degrees to go to a scaling filter located below the heater then pass through to the outlet of the filter turn 90 degrees up 2 inches and then 90 degrees back 5 inches then, at last, turn 90 degrees up to the cold water inlet. That seems a little excessive on the 90 degree elbows, all of which were soldered 3/4" copper. Then the hot water came out of the hot water outlet through a flex line that hit a straight pipe in front of the heater till it hits a 90 degree turn going back towards the heater but 3" below the ceiling till it is hits another elbow going up to the ceiling into another elbow that leads back to the hot water line next to the cold water line till it hits two more elbows that climb in step fashion into a joist bay in the ceiling. My conclusion is that someone hired a plumber from a Dr. Seuss children's book and I couldn't live with it any more, but as I said I'm not a plumber and hate sweating copper pipes that are attached to wooden structures that are covered in highly flammable foam insulation that is sprayed into the bays and can't be removed. The only solution I could find was pex. I used 2 - sharkbite connectors and 2 Sharkbite 90 degree pipe supports and two sharkbite flex connectors and got rid of about 15 feet of copper pipe and 15 copper elbows. I was also able to locate the heater 7 feet closer to the bathrooms and kitchen. I had no problem finding the numerous youtube videos on how to install pex and use the sharkbite connectors. I went with the push fittings, because I only needed two of them to join the existing copper to the pex and two of them to connect nipples for the scaling filter and the hot water outlet. The tools for the crimping connectors are very expensive, while the only tools required for the push fittings is the tubbing cutter and the sharkbite deburrer/ gauge. I was surprised that none of the joints I created leaked at all. Now I have a clean looking hot water heater installation and no more Whoville plumbing.

Only bad thing about this is trying to straighten the tubing is a chore to say the least.

You cannot bend it straight. My guess is that it is old stock which was coiled up for years. Even a heat gun doesn't work.

Just as described. Well made. Awesome

PEX fitings and valves are a great solution for plumbing in many instances. There are many sizes and types of PEX fittings, and fixtures available.