Defender Series OPV Drop Tube Installation


DIRECT FILL
Calculate final shutoff volume

Enter actual tank capacity (Gallons)

Final shutoff volume (Gallons)
Final Shutoff Volume Height

Final Shutoff Volume Height [B]

Upper Drop Tube length

Enter drop tube seat surface
to bottom of tank (mm) [A]

Upper Drop Tube Length [X]
Lower Drop Tube length

Lower Drop Tube Length [Y]

INCHES (Fraction to Decimal)
1/8 = 0.125
1/4 = 0.250   3/8 = 0.375
1/2 = 0.500   5/8 = 0.625
3/4 = 0.750   7/8 = 0.875

REMOTE FILL
Calculate final shutoff volume

Enter actual tank capacity (Gallons)

Final shutoff volume (Gallons)
Final Shutoff Volume Height

Final Shutoff Volume Height [B]
Upper Drop Tube length

Enter drop tube seat surface to bottom of tank [A]

Upper Drop Tube Length [X]
Lower Drop Tube length

Lower Drop Tube Length [Y]

Calculate the lower remote fill splice cut in the upper drop tube
Measure from the seat surface of the upper drop tube to the top of the T fitting lower nipple.

Enter Distance [T]

Lower cut

Upper cut

INCHES (Fraction to Decimal)
1/8 = 0.125
1/4 = 0.250   3/8 = 0.375
1/2 = 0.500   5/8 = 0.625
3/4 = 0.750   7/8 = 0.875