Custom drilling...why does it matter?

Selecting the proper nozzle is a very important part of a successful water jetting job. Knowing your systems output specs, as well as an understanding of their relation to nozzle performance, is essential to nozzle selection.

Every jetter has a certain amount of flow and pressure output. That output represents the maximum potential energy available for cleaning activity. When the total orifice area is matched to the pump’s specifications, all the available energy is harnessed. If the total orifice area is too small, energy is wasted as back pressure. If the total orifice area is too large, maximum jet velocity and pulling power is reduced.

At Aqua Mole, your pumps pressure and flow specifications are used to calculate the optimum orifice diameter for your selected spray pattern. As a resullt, you'll get the most out of your equipment.

Standard Spray Angles And Their Functions

Direction

Jet Angle Function & Usage Considerations

Angle

Forward

0°

A single forward jet is used for boring through blockages. Generally these
forward jets are used in combination with higher thrust angles.

Forward

10°

Used on our Degreaser/De-Icer nozzles (3 fwd. jets) to provide a wider forward cleaning and/or pushing action vs. a single forward jet. Since forward jets have a reverse thrust effect, there should be a minimum of two rear jets for each forward jet to provide forward nozzle movement.

Forward

45°

Forward direction wall cleaning. Unless used on a lance (where no propulsion is needed), there should be a minimum of two rear jets for each forward jet to provide forward nozzle movement.

Side

90°

Side jets directly impact the pipe wall and deliver the most cleaning energy but must be combined with a thrust angle in order to create pulling power. A single 90° jet can be added to the BN or RH style nozzle to aid in the navigation of tight corners.

Rear

15-25°

These are thrusting angles where the system's energy is utilized primarily for maximum pulling power on longer runs with minimal flushing action.

Rear

35°

Jets using this angle provide a good combination of flushing and thrusting
action with good pulling power for use on medium runs.

Rear

45°

This popular jet angle provides very good cleaning power with reasonable
pulling power.

Rear

55-65°

Jet angles in this range use the system’s energy primarily for high impact
cleaning of pipe walls. The trade off is minimal pulling power.

Determining the correct jetting hose NPT connection

The hose diameter cannot be used as an indication of the thread size on the hose connector fitting. If you are not certain, measure the outside diameter (O.D.) of the fitting's thread at the very end, round to the closest reference measurement below and note the corresponding NPT size.

Actual O.D. Measurement of hose fitting

3/8"

1/2"

5/8"

3/4"

1"

1-3/8"

1/8"

National Pipe Thread Size (NPT)

1/4"

3/8"

1/2"

3/4"

1"

Example: In the picture to the right, the fitting is measuring an ACTUAL O.D. of 1/2", making it a 1/4" NPT fitting.

Custom drilling...why does it matter?

Selecting the proper nozzle is a very important part of a successful water jetting job. Knowing your systems output specs, as well as an understanding of their relation to nozzle performance, is essential to nozzle selection.

At Aqua Mole, your pumps pressure and flow specifications are used to calculate the optimum orifice diameter for your selected spray pattern. As a resullt, you'll get the most out of your equipment.

Standard Spray Angles And Their Functions

​

Direction

Jet Angle Function & Usage Considerations

Angle

Forward

0°

A single forward jet is used for boring through blockages. Generally these forward jets are used in combination with higher thrust angles.

Forward

10°

​Used on our Degreaser/De-Icer nozzles (3 fwd. jets) to provide a wider forward cleaning and/or pushing action vs. a single forward jet. Since forward jets have a reverse thrust effect, there should be a minimum of two rear jets for each forward jet to provide forward nozzle movement.

Forward

45°

Forward direction wall cleaning. Unless used on a lance (where no propulsion is needed), there should be a minimum of two rear jets for each forward jet to provide forward nozzle movement.

Side

90°

Side jets directly impact the pipe wall and deliver the most cleaning energy but must be combined with a thrust angle in order to create pulling power. A single 90° jet can be added to the BN or RH style nozzle to aid in the navigation of tight corners.

Rear

15-25°

These are thrusting angles where the system's energy is utilized primarily for maximum pulling power on longer runs with minimal flushing action.

Rear

35°

Jets using this angle provide a good combination of flushing and thrusting action with good pulling power for use on medium runs.

Rear

45°

This popular jet angle provides very good cleaning power with reasonable pulling power.

Rear

55-65°

Jet angles in this range use the system’s energy primarily for high impact cleaning of pipe walls. The trade off is minimal pulling power.

Determining the correct jetting hose NPT connection

Actual O.D. Measurement of hose fitting

3/8"

1/2"

5/8"

3/4"

1"

1-3/8"

1/8"

National Pipe Thread Size (NPT)

1/4"

3/8"

1/2"

3/4"

1"

A single forward jet is used for boring through blockages. Generally these
forward jets are used in combination with higher thrust angles.

Used on our Degreaser/De-Icer nozzles (3 fwd. jets) to provide a wider forward cleaning and/or pushing action vs. a single forward jet. Since forward jets have a reverse thrust effect, there should be a minimum of two rear jets for each forward jet to provide forward nozzle movement.

Jets using this angle provide a good combination of flushing and thrusting
action with good pulling power for use on medium runs.

This popular jet angle provides very good cleaning power with reasonable
pulling power.

Jet angles in this range use the system’s energy primarily for high impact
cleaning of pipe walls. The trade off is minimal pulling power.