Home/Parts/Large continuous level parts

RDF-4000 series

Large continuous level parts

The larger end of the catalog: tank fittings to 2 inch NPT, WEMA style flanges, overmolded cable, and the bigger foamed floats that ride a 1/4 inch pipe or a 1/2 inch tube.

RDF-4001

Large tank fitting

The main tank penetration for a continuous level application, with a threaded port in the hex and a center bore for the stem.

  • External thread1 1/2 and 2 NPT
  • Port in hex3/8 NPT
  • Bottom center1/4 Sch 40 PVC pipe
  • Or1/2 in nylon tube
  • Or1/4 NPT

RDF-4201

WEMA style flange

Flange for WEMA style tank fittings. Shares the port and bore options of RDF-4001.

  • StyleWEMA
  • DetailsSee RDF-4001

RDF-4002

Overmolded cable

Cable gland overmolded onto the lead for a fully sealed penetration, with the strain relief formed in the same shot.

  • Sealing100 percent waterproof
  • Thread3/8 NPT
  • Strain reliefIntegral

RDF-4404

Intermediate float stop

Sets a travel limit part way down the stem for a multi point assembly.

  • Fits1/4 Sch 40 PVC pipe
  • Or1/2 in nylon tube

RDF-4403

End plug and float stop

Closes the bottom of the stem and stops the float in a single part.

  • Fits1/4 Sch 40 PVC pipe
  • Or1/2 in nylon tube

RDF-4501-R

Foamed float, 1 1/2 in

The larger foamed polypropylene float, with a choice of magnet form.

  • Size1 1/2 in dia x 2 1/8 in
  • MaterialFoamed PP
  • MagnetRound, square or ring
Suffix meaning: confirm

RDF-4502-S

Foamed float, 1 5/8 in

Wider and shorter than the RDF-4501, for a different displacement in the same bore.

  • Size1 5/8 in dia x 1 3/4 in
  • MaterialFoamed PP
  • Specific gravity0.6 or higher
  • MagnetRound, square or ring
Suffix meaning: confirm

Stem interfaces

Everything in this series is built around two stem sizes, so parts interchange along the assembly.

What fits what
Part Function Stem interface
RDF-4001 Tank fitting, 1 1/2 and 2 NPT external 1/4 Sch 40 PVC pipe, 1/2 in nylon tube or 1/4 NPT
RDF-4201 WEMA style flange As RDF-4001
RDF-4404 Intermediate float stop 1/4 Sch 40 PVC pipe or 1/2 in nylon tube
RDF-4403 End plug and float stop 1/4 Sch 40 PVC pipe or 1/2 in nylon tube
RDF-4002 Waterproof overmolded cable, integral strain relief 3/8 NPT
Large foamed floats
Part Diameter Length Magnet Specific gravity
RDF-4501-R 1 1/2 in 2 1/8 in Round, square or ring Ask
RDF-4502-S 1 5/8 in 1 3/4 in Round, square or ring 0.6 or higher

Confirm the specific gravity for RDF-4501-R when you inquire rather than assuming it matches the RDF-4502. As with every float in the catalog, either part can be molded to any density above its minimum.

Diesel and fuel oil

All floats are available in nylon for diesel and fuel oil applications. Give us the fluid when you inquire and we will tell you which material the service needs.

Request continuous level pricing

Tell us the tank thread, the stem you are running and how many switch points you need.