Q: Have you come across tools to insert drippers in tubes or pipes? Pushing the dripper’s into the tube is leaving my fingers bruised.
A: You’re right, some of the hole punches are better than others. I have one that has a nice big grip handle on it that is easy to hold. But another inexpensive hole punch I have simply has a rounded top that you press with your palm to force the punch into the tube. It makes your palm sore after just a few uses. Pressing the emitters into the holes can be a pain too. Inserting a couple dozen emitters into the holes can leave your finger tips hurting! Some emitters have irregular, rough, or sharp edges that make it even worse.
Fortunately there are many tools made to help you out.
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There are any number of simple hole punches. Some are small and hard to hold, some have larger handles which makes them a bit easier. All of these are very simple tools, you hold them in your hand and press a sharp tip through the wall of the tubing, a bit like an ice pick would work. Actually an ice pick would work to make a hole, however I have found that any type of pointed punch tends to be too aggressive; it punches a hole through one side of the tube and out the other, making two holes! Then you have to put a goof plug in one of them to plug it up.
Another thing to consider is the shape of the hole punched. Most punches actually create a round hole about an 1/8″ in diameter. Some create holes as large as 1/4″ for specific brands of emitters with larger barbs. It is much easier to get the emitter into a round hole than one made with a pointed tip, such as a nail. When holes are made with a pointed tip the plastic tube tends to stretch as the tip goes through it. Then the hole closes back up when you pull the tool out, the resulting small hole is hard to get the emitter barb into. Also a pointed tip is more likely to tear the tubing wall as the tubing stretches around the tool, creating something more similar to a slit than to a round hole. There is some debate as to if these tears in the tubing will enlarge over time (similar to how a tear in a plastic bag sill get larger if you pull on it.) I tend to think you are better off with a round tipped punch that punches an actual round hole in the tube, as opposed to a pointed tip.
Note that any punch that you hold with your finger tips, or press a small “knob” with your palm to operate, is going to be hard on your fingers or palm if you install more than a dozen emitters at a time. These super cheap punches work fine for a few emitters, but beyond that… ouch!
There are more sophisticated hole punch tools, like the Miracle Punch. It holds the tube firmly in place which aligns the hole properly. It operates similar to a pair of pliers, which is much easier on your hands. There is at least one other “pliers type” tool I have seen on the market, however it does not hold the tubing as firmly.
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There are a number of devices made to install the emitters. Most of these are product specific, that is they only work with a particular brand and model of emitter. They generally have a handle on one end and a molded cradle that you place the emitter in on the other. You place the emitter in the cradle and then press it into a hole you have already punched in the tube using a hole punch. Some of these device have both the hole punch and emitter insertion cradle as part of the same tool.
Some companies, like Rainbird, make emitters that are “self punching”. The barb on the emitter is sharp enough to create it’s own hole when pressed hard against the tube. Rainbird makes a tool that you place the emitter in, then using the tool you press the emitter into the tube. My experience is that you need this tool to use the self-punching feature of the emitter. Without it I have not had much success getting the emitters lined up correctly and pressing them in with your fingers is near impossible. You don’t have to use the tool to insert the Rainbird emitters, it works fine to punch a hole first using a punch and then stick them into the hole.
TIP: Try wearing heavy leather gloves when installing the emitters to reduce hand pain. Also try putting a couple of pieces of cardboard in your palm between the hole punch and your hand, to help distribute the pressure over a larger area of your palm.