MiniJet - Pool pump Jandy - Free user manual and instructions

Brand	JANDY
Model	MiniJet (FFMJ-VL for Vinyl Liner)
Product Type	Pool Circulation Jet
Application	Vinyl Liner Pools (also standard for deck)
Material	PVC housing, brass jets, stainless steel mounting hardware
Mounting Type	Through-wall installation at mean water level
Water Connection	1/2" PVC pipe
Flow Rate (GPM)	2.1 to 4.4 GPM per nozzle
Jet Spray Height	3.3 ft to 13.1 ft
Head Loss (Feet)	3.9 ft to 16.0 ft
Maximum MiniJets per Pipe	26 with 3" return pipe
Cutout Size	3-5/16" x 3-5/16" square
Included Components	Housing, rear mounting plate, front plate, gasket, brass jets, cover, screws, 3/8" plug
Installation Template	Included (layout template)
Winterizing	Drain water and install 3/8" plug in nozzle inlet
Pressure Testing	Required before liner installation
Weight (approx.)	1.5 lbs (0.7 kg)

Frequently Asked Questions - MiniJet Jandy

How do I install the Jandy MiniJet in a vinyl liner pool?

Use the provided layout template to mark the cutout. Drill 1/4" mounting holes and 3/8" corner guides, then cut the center square with a jigsaw. Insert the housing from the water side, secure with the rear mounting plate and screws. Connect 1/2" PVC pipe to the manifold.

What is the recommended flow rate per MiniJet?

The recommended flow rate is 4.4 GPM per nozzle for adequate water projection. Lower flow rates (2.1 GPM) result in shorter spray height.

How do I winterize the MiniJet?

Drain all water from the MiniJet plumbing. Screw the provided 3/8" plug into the nozzle inlet of the housing to protect it during freezing temperatures.

Can the MiniJet be used in concrete or fiberglass pools?

This model (FFMJ-VL) is designed specifically for vinyl liner pools. For deck installations, use the standard Polaris MiniJet (FFMJ). Concrete pools require a different mounting method.

What tools are needed for installation?

You will need a 1/4" drill bit for mounting holes, a 3/8" drill bit for corner guides, a jigsaw with a compatible blade, a tape measure, and a screwdriver for the mounting screws.

How do I adjust the water jet spray?

After startup, screw the brass jets into the threaded fittings. Adjust the nozzle alignment and plumbing valves until the desired spray height and direction are achieved.

What pipe size should I use for the feed line?

Use 1/2" PVC pipe to connect each MiniJet to the manifold or plumbing loop. The return pipe sizing depends on the number of jets; see the chart in the manual (e.g., 2" for 12 jets).

How many MiniJets can be installed on one plumbing loop?

Up to 26 MiniJets can be connected to a single loop with a 3" return pipe. For smaller pipes, fewer jets are recommended (e.g., 8 jets with 1-1/2" pipe).

How do I clean the MiniJet nozzles?

Remove the housing cover and unscrew the brass jets. Soak them in a mild acid solution (like vinegar) to remove scale, then rinse and reinstall. Do not use abrasive tools.

Where can I find replacement parts for the MiniJet?

Replacement brass jets, plugs, gaskets, and covers are available from JANDY dealers or online pool supply stores. Use the model number FFMJ-VL for vinyl liner versions.

USER MANUAL MiniJet Jandy

MiniJet® for Vinyl Liner Pool Installation

The Polaris MiniJet for vinyl liner pools (FFMJ-VL) is designed to mount in a vinyl pool wall slightly above water level. It can be mounted in wall panels with a thickness of .1094" (12Ga. Steel) to 3/8" (polymer wall). For deck installations, use the standard Polaris MiniJet (FFMJ).

Preparing For Installation

Determine the mean water level of the pool and the vertical center line of each MiniJet. If water covers the nozzle, the performance will be affected. Mounting it too high may interfere with the coping and liner installation.

Pressure testing is required. Screw the 3/8" plug provided into the nozzle inlet of the MiniJet housing. This plug is also used for winterizing, so do not discard.

Store the brass jets, the MiniJet housing cover, the 3/8" plug and the four screws for pool start-up.

Prevent dirt and debris from entering the plumbing lines during construction.

Installing The MiniJet

1. Position the Layout Template to line up with the vertical center line and mean water level. Tape it to the pool wall.
2. Use a 1/4" bit to drill fourteen (14) mounting holes.
3. Use a 3/8" bit to drill the four (4) corner holes used as guides for cutting out the center square.
4. Use a jigsaw and blade compatible with the material of the pool wall to cut out the center square, cutting around the outer edges of the four (4) holes.
5. Insert the MiniJet housing through the wall from the water side. Rest the back of the housing flange against the inside of the pool wall.
6. Position the rear mounting plate over the back of the MiniJet housing on the outside of the pool wall. Insert the two (2) pan-head screws in the center holes (top and bottom) of the flange, through the pool wall and into the rear mounting plate. Secure housing to pool wall.

Plumbing The MiniJet

Water flow and pressure control the projection of the water. As a rule, 4.4 GPM per nozzle will provide adequate water flow. Refer to data below.

MiniJet Performance Data Chart
Height of Jet Spray	3.3'6.6'	9.8'13.1'
Feet of Head	3.9'7.9'	11.9'16.0'
GPM 2.13.0	3.74.4

1. Determine the size of the manifold or plumbing loop and return pipe required.

MiniJet Pipe Sizing
Max. MiniJets	Return Pipe Sizing	Suction Pipe Size
81-1/2"1-1/2"
122"	2"
162-1/2"2-1/2"
263"	3"

1. Use 1/2" PVC pipe to connect the MiniJet to the manifold or plumbing loop. See plumbing diagram below.

graph TD
    A["Manifold Pipe"] --> B["MiniJet"]
    B --> C["Valve"]
    C --> D["From Pump"]
    D --> E["Riser"]
    E --> F["See Chart for Proper Sizing"]
    F --> G["Extend Past Last MiniJet 5' Minimum"]
    G --> H["Optional Loop"]

1. When the MiniJets are lined up to project water streams of equal distance, cut the riser to equal lengths. When the MiniJets are not set in lines parallel to the pool ledge, valve each MiniJet separately.

2. Keep the 1/2" feed pipe short, and the manifold or plumbing loop as close to the beam as possible. Avoid undue stress on plumbing lines.

3. The manifold pipe should extend 5 ft. past the last MiniJet®.
4. Pressure test the MiniJet.
5. After the liner is installed, place the gasket between the front plate and the liner. Attach the front plate, tightening each screw a little at a time to seat the liner and gasket.
6. With a sharp knife, cut out the center 3" square of the vinyl liner.

Pool Startup

1. Clean the pool water.
2. Remove threaded plug from the MiniJet housing. Save plug for winterizing. Run water through the MiniJet plumbing to clear lines.
3. Screw the brass jets into the threaded fittings. Adjust nozzle alignment and plumbing valves until the desired projection is reached.
4. Install MiniJet housing cover.

Winterizing

1. Drain all water from the MiniJet plumbing.
2. Screw the 3/8" plug provided into the nozzle inlet of the MiniJet housing to protect the unit.

Pure electrical circuit lines without any symbols

FRONT VIEW AFTER INSTALLATION

MiniJet® for Vinyl Liner Pools (FFMJ-VL)

LAYOUT TEMPLATE