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Installation Procedure for Model ADA100 Rotary Hand Pump

Section 4: Pump Cylinder, Drop Pipe Installation

In this section we will review the installation of the entire string of new drop pipe with the pump cylinder at the bottom. Be extremely cautious during this sequence... dropping the entire string down the well is easy to do and once dropped they are almost impossible to retrieve. Follow these directions!

Tools / Supplies needed
one pair of channel locks
one pipe wrench
two pairs of vise grips
safety tool (P11)
Allen wrench set
Teflon tape
one gallon bleach solution made up of 50% chlorine bleach and 50% water.


Before starting, let's identify and organize the parts that we will need. On the ADA100, the drop pipes are all identical except the one that will be used on the top (D5). This one has male threads on both ends…1” threads on the bottom end, 1-¼” threads on the top end. A 1/16” diameter weep hole has been drilled at a point three feet down from the top fitting. The weep hole location is marked with magic marker.

a) Lay out all of your pipes with the capped ends away from you.

b) Take the pump cylinder (P1) with piston rod male threads protruding and thread on a female sucker rod end. Tighten the sucker rod couplers with two pairs of vice grips. Tighten to the point where the two fittings are shoulder–to-shoulder. Do not over tighten.

c) Apply Teflon tape and thread the drop pipe into the pump cylinder. Be careful not to cross thread. Hand tighten the PVC drop pipe into the SS body of the pump while holding the pump body with one channel lock or pipe wrench.

d) Pour the bleach solution over the pump cylinder. (Watch your clothes.)

e) (two persons) Now stand the assembly on end with the pump cylinder at the bottom, and insert the assembly into the new well cover through the 2-3/4” hole. When the pump passes through the port, slide the safety tool over the pipe and let it lay on the well cover. As the pipe is lowered, the safety tool will stop the drop pipe at the coupling. You can now let go of the drop pipe.

f) You should be looking at a female coupling with a male sucker rod end protruding about 4". (The piston rod should be pushed to the bottom of the pump cylinder if it is not already there). Now take a sucker rod guide (D3) and slide it over the protruding rod and into the female coupling. Then take a sucker rod with female end and thread this onto the protruding male sucker rod end. Tighten the sucker rod couplers (DO NOT grip on the fiberglass rod) with two pairs of vice grips until the male and female sucker rod couplers are shoulder-to-shoulder. Do not over tighten. Do not crush either the stainless steel fittings or the fiberglass rod.

g) Take another section of standard drop pipe (D1) and stand on end with the blue plastic cap down. With one person holding the pipe upright over the female coupling in the well cover held in place by the safety tool, the other person can remove the blue plastic cap. Apply Teflon tape and then thread both pieces of drop pipe together making sure they are not cross threaded. Hand tighten the newly-added drop pipe while holding the outside of the female fitting of the already-assembled drop pipe with one pair of vise grips. DO NOT TIGHTEN TO MORE THAN 5/8” OF THREAD ENGAGEMENT OR YOU WILL DISTORT THE ROD GUIDE. Do not let the coupling spin on the safety tool, as it can work its way out. Lift the pipe string while the other person removes the safety tool. As soon as the coupling passes through the port, re-position the safety tool and hold it until the next coupling approaches. As the next coupling nears the safety tool, the other person can grab the sucker rod and pull upward helping to support the load and to keep the other person from pinching his fingers as the coupling comes into contact with the safety tool.

NOTE: This process is repeated for each section of standard drop pipe. When you suspect that you might be near your water level, pull up on the sucker rod at any time. If you are not in the water yet, the rod will fall very quickly. When you are in water, the rod will fall more slowly. Sometimes, as the pipe is lowered, a gurgling sound can be heard when the pump is in water. You can also stroke the rod repeatedly and water will be pumped up the string. If you are in water, it will become harder to stroke after ten strokes or so. The pipe string is also much heavier with water in it.

DO NOT OVER TORQUE THE SECTIONS OF DROP PIPE AS THIS CAN DISTORT THE ROD GUIDE AND CAUSE SEVERE BINDING. THE MALE NPT THREADS ARE TAPERED AND EXCESSIVE TORQUE IS NOT NECESSARY TO PREVENT LEAKAGE. TIGHTEN TO A MAXIMUM OF 5/8” OF THREAD ENGAGEMENT.

h) When you are ready for the top drop pipe, install it just like the others. A rod guide is required in the top fitting. Linear alignment of the top end of the top sucker rod will be controlled by the ¾” shaft and the rod gland at the pump head and the last, top rod guide. Lower this drop pipe down to the safety tool just like the others completed so far.


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