Making the Drillhead

I received several requests for information on how to build a drillhead.  There are many configurations of PVC parts that will suffice.  One principle that should be followed is to avoid anything that will slow down the flow of water.  In a previous drillhead I had two 3/4' pipes flowing into one 3/4" pipe.  That no doubt cost me some "drilling" power.  Water flow is absolutely critical.  In the updated drillhead I have the two 3/4" pipes flowing directly into a 2" pipe to avoid any loss of pressure. 

If anybody has any suggestions on any other ways to enhance water flow, please let me know and I will post them.

The video below demonstrates the best combination I have come up with. 

MAKING THE DRILLHEAD

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Here is the old drillhead.  As you can see, it has two 3/4 inch pipes leading into one 3/4 inch pipe restricing the water flow.

Pieces for the New Drillhead

2 inch by 2 inch flexible coupling - Lowes part 23473 - $4.33

2 inch piece of PVC cut to 3 1/2 inches long

2 inch PVC T - Lowes Part 23908 - $2.49

3/4 inch by 2 inch bushing - Lowes Part 23003 - $1.19

Four pieces of 3/4 inch PVC, each cut 1 1/2 to 2 inches long

Two 45 degree 3/4 inch elbows - Lowes Part 23891 - 75¢ each

Two 3/4 inch slip to 3/4 inch hose connectors - Lowes Part 194629 - $1.47 each

Everything dry fitted together

Mounted on a piece of 2 inch PVC ready to connect hoses and use

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