I developed this irrigation repair technique out of desperation. A sprinkler head had launched itself out of the ground right beside me one day and landed in a potted plant. The resulting geyser was spectacular, but the location was horrible!
The area around this particular sprinkler head was surrounded in paving stone and brick, and worse, right up against a fence. To make things harder, I had installed a french-drain only a foot away! The riser's nipple was missing. Sure enough, a replacement stand-pipe wouldn't even begin to screw in! Obviously, the broken off part of the nipple was stuck in the t-connector - deep underground! Before I developed this technique, I would have had to dig lateral trenches about 2' long on each side of the connector, cut the supply lines off each end of the connector, added a sleeve and spacer, then glued in a replacement t-connector. Not this time! There was too much involved in digging this connector out of the ground!
4 Angle Grinder
I have a special purpose tool I'd bought from The Home Depot just for this problem. It's the PVC variant of an "easy-out." Unfortunately, it wouldn't work! I couldn't get enough pressure (the connector was buried just about the extractor's full length), and I kept scraping my knuckles against a fence post. The stand-pipe wasn't PVC, it was vinyl. It was so slick, the knife edges of the extractor wouldn't bite into the inside edge.
But vinyl melts! I have a 1200 watt heat gun I'd bought for paint stripping. The extractor's tip is metal and by using this heat gun, I got the extractor's tip hot. Real hot. Sizzling hot! By pushing the extractor straight down the hole, it gently melted into the broken off nipple - deep underground! I let it set and cool for a few minuets before giving it a twist. Two seconds later, the broken off nipple was extracted!
After screwing in a replacement riser, I cycled the irrigation pump to that zone to rinse out all of the dirt that had fallen into the connector. I put a new sprinkler head on the replacement riser, and guess what? That irrigation repair was done. Not only done, I didn't have to dig one spade of dirt!
The trick was heating up the extractor's tip hot enough to melt into the broken off vinyl nipple to get a grip.
A few weeks later, I had a different problem. I had mounted new window boxes along one side wall of my home and wanted to use my in-ground irrigation system to water the new flowers. I had a capped off riser right where I need to place a 4' riser. Unfortunately, this was an old steel riser that I'd bumped into several times with the mower, and when I removed the pipe it left the t-connector's threads stripped and choked with rust-scale! Unlike most of my irrigation repair projects, this line is very shallow. Shallow enough for me to scrape away the top to really see the damage.
There wasn't anything I could do to thread the new riser into place, I was going to have to replace the t-connector - or maybe not. I have a pretty complete shop and I have metal working tools to tap holes for screw threads, or cut outside threads for bolts. Since I had to go to The Home Depot or Lowe's anyway for a replacement t-connector, why not see if they had a tool for pipe threads?
The staff at Lowe's laughed when I asked them for a tool to cut internal 1/2" pipe thread for an underground PVC t-connector! Their only advice was to dig it up and replace it. No Way! The staff at The Home Depot didn't laugh out loud, but they also suggested replacement fittings.
I did buy the fittings, but I also found the perfect tool - an 18" length of 1/2" steel pipe! Once again, the 1200 watt heat gun came to the rescue. By heating the pipe end, the thread section, I was able to plunge it into the buried t-connector. It sizzled as it sank in and I quickly worked it in deeper as I screwed it into place. Without letting it sit, I unscrewed the steel pipe to prevent it from welding into place. I repeated this operation several times until all of the pipe's threaded section was within the t-connector's nipple.
Guess what? The new replacement 4' PVC riser threaded itself right in! By using heat, pressure, and steel threads, I was able to partially melt the underground t-connector and cut new threads. Not a spade full of dirt was dug up for this irrigation repair!
Since then, I've helped neighbors with their irrigation repair projects that left them amazed - "you can actually cut new threads underground without having to dig" - Wow, thanks Bill, real big thanks!
Not all irrigation repairs can use this technique. Let's face it, if the t-connector's nipple or connecting pipes crack or break, you will have to dig. But try this tip first and see if it works. You'll know within minuets if there's a more serious problem. You'll get wet standing there, but you'll quickly see upwelling around the sprinkler head in operation if there's a broken pipe or cracked nipple. Oh well, at least you gave it a try!
I've had this cheap heat gun for more than twenty years. Not only does it do a great job lifting paint, I've used it for boat electrical repairs (heat-shrink tubing), removing self-adhesive vinyl tile, contact paper, and sanding disks, and even starting fires in my charcoal pit. This is NOT a hair dryer - keep safe, keep it away from you at all times!
In conclusion, I was able to use my cheap heat gun and cheaper steel pipe to apply enough heat and pressure to re-mold stripped out internal threads, and enough raw heat to let another tool's edges cut into material that without that tool, would have required digging lots of dirt for these simple irrigation repair projects!
Christmas Sales Bare-Tool Makita BGA452Z 18-Volt LXT Lithium-Ion Cordless 4-1/2-Inch Cut-Off/Angle Grinder (Tool Only, No Battery) 201
Dec 09, 2011 20:17:17
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Christmas Sales Bare-Tool Makita BGA452Z 18-Volt LXT Lithium-Ion Cordless 4-1/2-Inch Cut-Off/Angle Grinder (Tool Only, No Battery) Feature
- Makita-built motor delivers 10,000 RPM for 50% faster grinding
- Compact, ergonomic design at 12-1/2 inches long and weighs only 5.3 lbs. for reduced operator fatigue
- A built-in L.E.D. protection circuit with over-torque control protects the motor
- Makita LXT Lithium-Ion battery and Energy Star rated 30-Minute Rapid Optimum Charger produces 430% total lifetime work with 2.5X more cycles
- 3-year warranty on tool
Christmas Sales Bare-Tool Makita BGA452Z 18-Volt LXT Lithium-Ion Cordless 4-1/2-Inch Cut-Off/Angle Grinder (Tool Only, No Battery) Overview
This 18-volt cordless cut-off/angle grinder from Makita has an LXT Lithium-Ion battery and an optimum charging system that produces 280 percent total lifetime work, with twice the cycles of an ordinary battery. This tool grinds up to 50 percent faster, with an impressive 10,000 rpm top speed -- and its ergonomic shape fits like a glove, offering even pressure and smooth control. The BGA452Z features a built-in electronic control circuit with LED warning lights for overload protection, a slide switch with lock-on, and a compact design that's only 12-1/2 inches long and weighs just 5.6 pounds.Christmas Sales Bare-Tool Makita BGA452Z 18-Volt LXT Lithium-Ion Cordless 4-1/2-Inch Cut-Off/Angle Grinder (Tool Only, No Battery) Specifications
Makita's 18V LXT Lithium-Ion Cordless 4-1/2-Inch Cut-Off/Angle Grinder delivers 10,000 RPM of compact grinding power to the jobsite. The BGA452Z is engineered to grind, cut, and sand a wide range of materials including tile, concrete, pipe, conduit, and more. | ||||
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The BGA452Z features a Makita-built high-torque motor that delivers 10,000 RPM, as well as an all-metal helical gear transmission which is longer lasting and delivers a more efficient transmission of energy when compared to angled gears. The BGA452Z also has a built-in electronic control circuit with L.E.D. warning lights for overload protection, and an electronic current limiter that automatically shuts off the current when the motor continues to be overloaded. This feature protects the motor for longer life.
Ergonomic Design in a Compact Size
The BGA452Z weighs just 5.3 pounds (with battery, sold separately) with a more compact design at only 12-1/2 inches long. The ergonomic shape fits like a glove with even pressure and even control, and the built-in L.E.D. light illuminates the work surface for more efficient work.
Versatile Design for a Range of Applications
The BGA452Z will grind, cut, and sand through a range of materials including tile, concrete, all-thread, Unistrut, pipe, channel iron, copper pipe, tubing, and more. It is ideal for tile setters, masons, welders, electricians, pipe fitters, sprinkler installers, HVAC, plumbers and any general contractor seeking a best-in-class engineered cordless cut-off/angle grinder. The BGA452Z is just another example of Makita's commitment to innovative technology and best-in-class engineering.
About Makita's 18V LXT Lithium-Ion Cordless Tool Series
Makita is a worldwide manufacturer of industrial quality power tools, and offers a wide range of industrial accessories. Makita applies leading-edge innovation to produce tools that are stronger, lighter, more powerful and easier to use. Makita USA, Inc. is located in La Mirada, California, and operates an extensive distribution network located throughout the U.S. For more information, please call 800/4-MAKITA (800/462-5482) or visit the website at makitatools.com. Makita is Best in Class Engineering.
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What's in the Box
Makita BGA452Z 18V LXT Lithium-Ion Cordless 4-1/2-Inch Cut-Off/Angle Grinder (tool only).
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