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HornBlasters train horn kit installed under a vehicle

Help Center · Conductor's Special

Conductor's Special — Connecting The Shocker Horns To The Air Tank

Plumb the solenoid, 4-way banjo, and equal-length air lines so all four Shocker bells fire together.

  • What you need: 1/2" NPT × 1/2" PTC fittings (2), 1/2" NPT solenoid valve, 4-way banjo fitting, four 1/8" FNPT × 5/16" PTC elbows, 1/2" and 5/16" air line

Getting Started

Your horn kit came with this assortment of fittings below.

  • A — 1/8" FNPT × 5/16" PTC elbow (4)
  • B — 1/2" NPT solenoid valve
  • C — Banjo fitting (4-way)
  • D — 1/2" MPT × 1/2" PTC fitting (2)
1

Install PTC fittings on tank and valve inlet

Start by plumbing one of the two 1/2" NPT × 1/2" PTC (D) fittings into the tank. If you are using a 2-gallon tank, this fitting will only fit into the end-caps of the tank. If you have a 5-gallon tank, any of the 1/2" ports (other than the bottom-most port while mounted) can be used for this fitting.

Take the other 1/2" NPT × 1/2" PTC fitting and plumb it into the inlet side of the valve. If you are unsure as to which side is the inlet, take a look at the side of the valve.

The small arrow cast on the side of the valve indicates the direction of air flow that can pass through this valve. The arrow points towards the direction the air should be flowing. The side opposite from the arrow is the INLET, and the arrow always points towards the OUTLET.

2

Install the 4-way banjo on the outlet

Take the 4-way banjo fitting (C) and plumb it into the outlet port of this valve. Your valve should look like the following:

Solenoid valve with airflow arrow highlighted
Arrow shows airflow — inlet is opposite the arrow.
Labeled fittings A B C D for Shocker horn plumbing
A elbows · B valve · C banjo · D PTC fittings
Solenoid valve with inlet PTC and outlet manifold installed
Outlet manifold feeds the trumpet air lines.

Positioning The Horns

Now that the valve is setup and ready to go, you can start thinking about where you want to position your horns.

3

Mind line length and clearance

  • Each horn bell will connect to the solenoid valve. The kit includes 17 feet of 1/2" air line to go from the tank to the air valve, and 10 feet of 5/16" air line to go from the valve to each horn. Ten feet of 5/16" gives you roughly 2.5 feet of play from the valve to each horn.
  • The horns do not need to all face the same direction. You can face two forward, two backward, or all four in different directions.
  • Each bell must have at least 2–3 inches of room from the end of the bell. If the end of the bell is completely covered, the sound cannot escape from the horn and project.
4

Center the valve between the bells

Position each bell in the desired install location. Once each bell has been test-fitted in the desired location, find the center point between all of the bells. This is where the valve will be, so that each line from the 4-way banjo fitting can route to each horn. Before you make the install locations of these components permanent, make sure you have enough line to connect everything together.

Locate the roll of 1/2" and 5/16" air line that came with the kit. The 1/2" roll should be ~17' long, and the 5/16" roll should be ~10' long. Cut the roll of 5/16" line in half, then cut each half in half again to make four equal length pieces. Make sure each length is cut evenly — if the lines are different lengths, the horn bells will sound off at different times.

5

Elbows on each trumpet, then route lines

Take the elbow fittings (A) and plumb each onto the brass stud of each horn bell. These fittings can swivel and do not need to face any specific direction. You can swivel them around to accept the air line from the valve without kinking the line.

Once all four bells have the elbows installed, connect one of the 5/16" air lines into the elbow fitting and route it up to the four-way on the valve. Be careful not to kink the line by bending it too tight. Do this for all four bells.

5/16 inch PTC elbow installed on Shocker horn air inlet
Swivel elbow on each trumpet accepts the 5/16" air line.

Finishing Up

6

Connect tank to valve with 1/2" line

At this point, plumb the supplied 1/2" air line into the inlet side of the valve. Route the line up to your air tank, and plumb it into the 1/2" NPT × 1/2" PTC fitting. Your horns are now plumbed and ready for use. All that's left is wiring up the air valve!

Up Next: Relocate Your Air Filter

Relocating your air filter is one of the most important steps when installing your HornBlasters horn kit. If you are mounting your compressor outside the vehicle, chances are it's going to get wet at some point in its lifetime.

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