Galvanized Pipe Fittings –
Galvanized pipe is a selection of steel piping that is coated in a layer of zinc. If you have a property that is much more than 30 years old, your water pipes may possibly be produced up of galvanized piping. A functioning understanding of galvanized pipe is needed for the do-it-yourselfer who lives in an older house or does repair operate for folks.
Although the layer of zinc more than the steel was originally useful to increase the lifespan of your plumbing and avoid corrosion, it really is considering that been discovered that it has a tendency to react with the minerals in the water it carries, creating scale and lowering stress levels.
As such, galvanized pipe is only utilised in modern houses for hand rails and replacement of existing pipe. Galvanized nipples are nonetheless used to penetrate fire rated walls for sinks and urinals.
Galvanized pipe need to only be utilized in systems that carry water. Gas lines are not suitable for this kind of piping as the zinc flakes off and clogs the flow of gas.
Verify with the regional division of public functions to discover out the pH level of the water in your locale. If you have a nicely on your home, have a sample of water tested. Low pH, under six.five, is challenging on copper. This is a great purpose for employing galvanized pipe.
Installing Galvanized Pipe
Step 1 – Cut
Galvanized is installed in significantly the very same way as black iron pipe. The pipe comes in standard lengths of 21 feet. Hold the pipe for cutting in a pipe vise or a solid bench vise.
Put on a pair of safety gloves and googles, then reduce the pipe to length employing a pipe cutter with rotary cutting wheels. Use top quality cutting oil in this procedure. Always put on gloves when working with pipe.
- Tip: Spot cardboard or plywood under your cutting and threading area. This will save you a lot of cleaning later.
Step 2 – Deburr
Once it is reduce to length, deburr the interior of the pipe to eliminate the sharp ridge brought on by the cutting approach. With the pipe nonetheless held in the vise, thread the finish of the pipe with a die cutter, making certain you have the appropriate size for the diameter of the pipe. Once once more, use a excellent cutting oil to avoid damage to the die and ease the procedure. Turn the die on in half-turn strokes, backing off each turn to dislodge shavings from the die.
Reduce the thread to the width of the die. Simply because the thread is tapered, going farther will eliminate too significantly of the pipe, causing feasible leakage. Tap out shavings from the pipe and clean the threads. Be careful that you do not reduce yourself on the threads – they are very sharp.
You can buy a ratchet type threader for about $ 30 at discount tool locations that will deal with pipe up to 1 inch. As most locations charge $ five or a lot more to reduce a single thread, this may possibly be more economical in the end.
Step 3 – Fittings
Galvanized pipe is joined using fittings made of malleable cast iron. They are threaded onto the pipe to make the connection. Use Teflon tape and a great good quality pipe joint compound when attaching. Once the pipe is installed, turn on the water supply and check for leaks. If leaks are present, re-tighten any joints.
Be conscious that while galvanized pipe can be attached to current systems, particular plumbing pieces like black iron can accelerate corrosion when in speak to with the zinc. If this is one thing you have to contend with, use a dielectric fitting in between the two metals.
Make confident you are wrapping the Teflon tape in the proper direction. Facing the end of the pipe, you go in a clockwise path with at least four wraps, but no a lot more than six or seven. Then apply some pipe dope in the exact same direction. Tighten at least two turns past hand tight. If the pipe is nonetheless loose, you may possibly have to re-cut the pipe.
Step 4 – Hanging the Pipe
Undue anxiety on connections from the weight can lead to leakage. Assistance the pipe at least each and every six feet if it runs along a floor joist. You can use pipe hanging straps or use typical pipe hangers if the pipe is close to the assistance. Vertical runs should be supported at every floor level.
A excellent rule of thumb for placing supports is every single six-eight feet on horizontal piping. If you do have a leak, you may have to take some issues apart to repair the leak.
- Warning: Do not attempt to tighten a joint in the middle of a run, as you are also loosening the joint on the other end.
Step five – Joining with Copper
In case of leakage, galvanized pipe can be joined with copper. This is completed with a dielectric union. The reaction in between copper and galvanized leads to corrosion very swiftly, and the dielectric union eliminates this. The two metals are efficiently separated by a rubber washer.
Take away the old leaking joint. Cut the pipe with a hacksaw near the joint. Employing pipe wrenches, work back to the subsequent nearest joint, functioning in both directions. Check the galvanized to see if it is badly clogged with mineral buildup. If so, preserve operating backward until you find pipe that is not clogged.
Next, thread the galvanized pipe into the dielectric union, utilizing pipe joint compound. Uncouple the union, and solder the copper replacement pipe onto the union. Reattach, tightening nicely to avoid leakage.
The down side to this circumstance is if you find one particular clogged pipe and a leaking joint, the probabilities are very good that the complete program needs replacing. Nonetheless, utilizing a dielectric union will usually repair the concern for a long period of time.