Low Hot Water Pressure on Tankless Oil Furnace

Old 01-14-04, 02:12 PM
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Unhappy Low Hot Water Pressure on Tankless Oil Furnace

Someone please HELP me. About 5 months ago I shut off the main water supply valve to my home to do some soldering to pipes I needed to move during a bathroom/tub remodel. Since that time my hot water pressure throughout the house has been horrible.

The water pressure only is effected on the hot water side and appears to be getting worse as time passes.

I have tried shutting off the water supply, draining and turning the water back on several times hoping that somthing is lodged in a pipe and I can free the unknown object.

I attempted this again last evening and now I have almost no hot water pressure. If more than one faucet is turned on to hot no other faucet will do anything more than dribble.

My hot water is supplied by a oil furnace and it does not have a tank.

Does anyone have any suggestions at all, please help me, I am begging!!!
Old 01-14-04, 02:21 PM
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If you are familiar with the piping around the boiler, I can tell you where to look first. On the pipes going to the domestic hot water coil look for an inline fitting that the hot or cold pipe goes through. It can be anywhere from 3/4 to 1.5 inches in diameter and about 2 inches long. It may be gold or chrome. It wll be within about 3 feet of the coil. It is a flow restrictor. You may not have one at all but if you do, it probably has dirt blocking it. If it looks like you can remove it without cutting pipes, do so and clean it out. If you need to cut a pipe to get it out, let us know first. If you don't have a flow restrictor, you may have clogged up the coil inlet. That will probably require cutting the pipe and backflushing the coil. Post back with your knowledge level and any info on the flow restrictor.

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