Trenchless Underground Pipe Replacement

If you need to have sewer pipe, water supply line, or other underground pipe replaced at your home, talk to your plumber about going “trenchless”.  A relatively recent development in pipe replacement technology, trenchless pipe replacement is an excellent option for homeowners who want to avoid damage to lawns, driveways, and other landscaping features.

Traditionally, replacing a sewer line or water supply line meant digging a trench and burying the new pipe.  At a minimum, there will be significant damage to the lawn where the new pipe is laid.  In many cases, there will be additional damage to landscaping features, driveways, sidewalks, and other hard surfaces.

Trenchless excavation techniques minimize the damage because only two small holes need to be dug – one at each end of the pipe.  A cable or chain is fed through the old pipe or sewer line and a steel “pipe bursting head” is attached.  A flexible replacement pipe is attached to the bursting head and the cable or chain is used to pull the bursting head through the old pipe.  As it travels through the old pipe pulling the pipe behind it, the bursting head breaks up the old pipe and pushes the pieces out into the soil.  The result is a new pipe installed where the old pipe used to be without digging up your yard.

In addition to minimizing damage to your landscaping, driveways, and other hard surfaces, trenchless pipe replacement can usually be accomplished in less time than it would take using traditional digging methods.  Trenchless pipe replacement can even save you money by eliminating the cost of repairing the damage to driveways and landscaping features.

Trenchless Water Line Replacement

If you need to have your water service line replaced, be sure to consider your options before your plumber starts digging.  The traditional method is to dig a trench from the meter to your home, lay the new waterline in the trench, and then bury it.  This method leaves an ugly scar across your yard.  It can also be very trick if the water line runs under a driveway, sidewalk, or landscaping feature.

An alternative is using a trenchless excavation water line replacement technique.  Instead of digging an entire trench, your plumber digs a hole at the meter and another hole where the line enters your home.  Then a flexible water service line is pulled through the old line, breaking up the old as it goes.

Once the new line is in place, your plumber hooks up each end of the line and fills the holes. Trenchless pipe replacement is a little more expensive than trenching, but the big advantage to trenchless water line replacement is that there is limited digging and damage to your yard.

Trenchless pipe replacement only works in a relatively straight line.  If there is a sharp bend in the old water service line, a hole will need to be dug at that point and a fitting will be installed to make the sharp bend.  Also, only flexible pipe such as polyethylene or soft copper pipe can be used for the replacement water line.  If you want to use hard copper line or PVC, your only alternative is trenching.

Underground Pipe Replacement With Pipe Bursting

If you need to install a replacement water supply line, sewer line, or any other type of underground pipeline due to an underground pipe leak, you should ask your plumbing contractor if pipe bursting is a good alternative for you.

The traditional method of replacing a buried water service line or a sewer line involves digging a trench from where the line hooks up to the public utility lines to the spot where it enters the home.  A new pipe is laid and the ends are hooked up with the old line often left in the ground.

This method works well enough, but there are some serious disadvantages.  The digging usually leaves a long scar through your yard that may take years to fill in completely with grass and blend in with the rest of the yard.  Even if you put sod over the trenched area, the new grass rarely blends perfectly with the established lawn.

In addition, your water or sewer line may run under sidewalks, driveways, and landscape features such as ponds, retaining walls, and other hardscapes.  To avoid damaging these features and leaving a scar in the yard, consider trenchless pipe replacement.

Pipe bursting works by pulling a bursting head through the old pipe.  This head breaks up the pipe and presses the pieces into the surrounding soil.  New pipe is attached to the bursting head and pulled through the burst area.  The new pipe ends up in the space left behind by the old pipe.

With pipe bursting, some digging is necessary at each end of the pipe to hook it up to your home and the public water or sewer line, but no digging is usually necessary in your yard and your driveways, sidewalks, and landscaping will be left undisturbed.