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Question DetailsAsked on 3/20/2015

does a repipe of home include gas line

adding addition to home , and adding plumbing to addition but also repipe throughout home . Need both water (Hot and Cold) as well as gas line moved to the newer areas . So my question is "Does a repipe normally include gas line moving and alteration,as well as waterlines ?"

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1 Answer


To many people a repipe means only the pressure water pipes - hot and cold water. Specify what you want done in the scope of work - below are the plumbing components or systems that are usually considered for a remodel, and commonly only one or two are done at a specific time depending on their condition and on your need:

1) hot and cold water supply pipes in house

2) fixtures (faucets, etc) on hot and cold waterlines

3) water heater, hot water (hydronic or steam heating) boiler and radiators/piping

4) water treatment system (water softener, reverse osmosis, filter unit, etc

5) incoming main water supply line from street (or pump)

6) if on a well, pump and well piping and associated pressure tank and controllers, as needed

7) drain piping within house

8) drain piping under slab

9) sewer pipe from house to street

For instance, if you are looking at replacing hot and cold water lines because they are not real old but are corroded copper or flexible plastic that is going bad, there might be no reason to touch the waterline from the street or the sewer lines if they are in decent shape. If replacing because house if a 50-100 or more years old, then replacing gas and sewer lines (at least ones in the house and under slab) might make good sense, depending on what you see after a sewer cleaning and camera run. Gasline condition can be checked pretty easily by removing valves and driplegs and inspecting inside the line for typical condition. Generally, modern black iron gas lines last a LONG time - but if from the 50's or earlier you might consider replacing on general principle, because a lot of the gas before that time has a lot of sulfur in it, which tended to corrode the pipes- especially galvanized steel and copper pipes. I personally also don't like plastic gas lines at all, but especially those that are more than about 30-40 years old, because the chemicals in the gas and ozone in the atmosphere tend to embrittle it and make it crack with age.

A major consideration in scoping pipe (and electrical) rework during a major remodel is also future accessibility - one might replace all the lines in the walls and closed-in floors, but leave exposed pipes in the crawlspace or basement untouched (assuming they are in fair shape) because they are easier to replacein the future without significant damage to the interior furnishings. Certainly if you are putting in very fancy wood panelling or say a glued-on (as opposed to loose suspended) copper panel or mural painted ceiling I would consider at least new piping, or even totally rerouting utilities away from that type area so any future maintenance does not have to get into the fine finished surfaces.

Another factor is how long you expect to live there - if expecting it to be your forever retirement home or you are looking to rebuilt to like-new condition for flipping it you might change out more than if this is primarily am aesthetic remodel but you expect to move within 5-10 years.

A final factor of course is age and general condition of the house and the neighborhood - a house being remodeled to like new standards merits more investment (assuming you are not improving past the standard of the neighborhood) than one that will be a teardown next time it is sold.

Answered 5 years ago by LCD

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