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I-1031 

 

Page 3 of 3 

Rev. --     5/31/11 

screw clockwise until it stops to use the chart below and the number of turns from closed to determine the 
amount of product needed. No noticeable adjustment will occur past four turns out. Seven full turns out will 
completely loosen the screw. The chart below is for reference only. 
 

 

Bypass @ 20 PSI 

Bypass @ 30 PSI 

Bypass @ 40 PSI 

Bypass @ 50 PSI 

Approx. bypass 
water at all settings 

.93 GPM 

1.19 GPM 

1.38 GPM 

1.51 GPM 

 

# of Turns 

from Closed 

Oz/min @ 

20 PSI 

Oz/min @ 

30 PSI 

Oz/min @ 

40 PSI 

Oz/min @ 

50 PSI 

turn  3.7  4.3 4.9 6.1 

turns  6.1  7.4 8.6 9.2 

turns  29.4  38.4 44.8 48.6 

turns  62.7  75.3 92.2 99.8 

Note:

 The numbers listed are only the water that passes through the spray arm.  

This does not include the bypass water. 

 
 
 
Troubleshooting 

Symptom Probable 

Cause 

Remedy 

Too much product is getting 
into the container/Too little 
product is getting into the 
container. 

1.

 

Set screw not set properly 
 

2.

 

Bypass clogged or not working 

1.

 

Check to make sure the set screw is in the unit and 
is tightened down properly using the table above. 

2.

 

Look at the tubing to see if any clogs appear, 
watch the outlet tubing to be sure water is coming 
out of it. Remove clog if found. 

 
 
Warranty 

Merchandise Returns 

No Merchandise will be Returned for Credit Without DEMA’S Written Permission.  Returned 
Merchandise Authorization Number is Required in Advance of Return. 

Product Warranty 

DEMA products are warranted against defective material and workmanship under normal use and service 
for one year from the date of manufacture.  This limited warranty does not apply to any products that have 
a normal life shorter than one year or failure and damage caused by chemicals, corrosion, physical abuse, 
or misapplication.  Rubber and synthetic rubber parts such as “O”-rings, diaphragms, PVC tubing, and 
gaskets are considered expendable and are not covered under warranty.  This warranty is extended only to 
the original buyer of DEMA products.  If products are altered or repaired without prior approval of DEMA, 
this warranty is void. 

Defective units or parts should be returned to the factory with transportation prepaid.  If inspection shows 
them to be defective, they will be repaired or replaced without charge, F.O.B. factory.  DEMA assumes no 
liability for damages.  Return merchandise authorization number must be granted in advance of returned 
units for repair or replacement (See “Merchandise Returns” above). 

 
 

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