Frequently asked questions

To help keep you spraying the right way successfully, we have compiled a list of frequently asked questions so you can hopefully help yourself and get back out in the garden or on the work site sooner. If your question isn’t here nor in the instructions that came with your sprayer, please contact us.


I’m getting air out of the nozzle but no fluid or spray.

The supply (siphon) tube may be loose or missing. First, make sure pressure is released from the tank. Then, remove the hose from the tank by unscrewing the coupling. Lift off the hose. If the supply tube is not attached, check to see if it’s loose inside the tank. If it is, remove it from the tank and insert it into the hose at the coupling, and reattach the hose to the tank. If tube is missing, contact us to source a replacement.

I pump the sprayer but it will not build-up any pressure.

Follow the instructions in your owner’s manual to disassemble the pump assembly. Check the plunger cup to make sure it is correctly attached. Add a little petroleum jelly. Inspect the check valve at the bottom of the cylinder to make sure it is on and is not obstructed by dirt. Reassemble. If problems persist, the plunger cup or check valve may need replacing – check the Universal Service and Maintenance Kit.

My sprayer pressurises okay and I know the supply tube is in, but hardly anything comes out, maybe just a little spray or dribble.

Chances are there is dirt or debris somewhere in the discharge line. Most likely the nozzle is plugged. RELEASE THE PRESSURE by SLOWLY opening and removing the pump. Then, unscrew the nozzle cap and check to see that it’s clear (see diagram below). With the nozzle cap off, check the holes at the nozzle end – you may need to clean them or the nozzle cap. If the nozzle needs cleaning, use a broom straw or toothpick; do not use wire. Remove the wand from the end of the hose or shut off. Run water through it with the garden hose. Remove the hose from the tank and with the on/off valve open, run water from the garden hose through it. Also, make sure that what you are spraying is not too thick – very viscous (heavy or syrupy liquids) will not spray properly from any hand sprayer.

I can hear air leaking out between the pump and tank but no matter how hard I try to tighten the pump, air still leaks out.

Check the gasket on top of the pump cylinder. It may be dirty and won’t seal correctly, or it may need replacing. TIP: Put a bit of petroleum jelly on the gasket. The pump should seal with little turning pressure on the pump – not much more than ‘finger-tight’. Trying too hard to tighten down the pump, especially the first time, may damage the gasket and actually work against you. If the Hudson sprayer is on this site, you can download part breakdowns (schematics) that makes-up the sprayer. For service information or parts ordering, check our parts area and contact us.

My control valve doesn’t shut-off.

Clean the O-ring and seating surface on the control valve. Replace the O-ring if it is worn.

Hudson FAQ control valve and nozzle cleaning

It leaks where the wand joins the control valve.

Clean the O-ring in the wand and all sealing surfaces. Replace the O-ring if it is worn.

The tank doesn’t pressurize when the handle is pumped.

Lubricate the plunger cup with petroleum jelly (not oil), or replace the plunger cup.

It leaks where the cap joins the wand.

Clean O-ring on wand and sealing surfaces. Replace the O-ring if worn.

It leaks where the pump seals at the tank.

Clean the gasket sealing surfaces or replace the gasket.

Air leaks at hose connection.

Be sure that the gasket is tight. If O-rings are used, clean the sealing surfaces or replace the O-rings, then re-attach the hose.

Liquid or air enters the pump cylinder.

Clean the check valve sealing surface, or replace the check valve.

How do I properly clean and store my sprayer?

IMPORTANT! Always release pressure BEFORE opening or servicing your sprayer. First, turn the sprayer upside-down. Turn the nozzle away from you and squeeze the control lever until all air has escaped. Then:

  1. Hudson FAQ cleaning stepsEmpty your sprayer and add some water.
  2. Add some dishwashing soap.
  3. Seal the tank.
  4. Shake to clean the tank, and spray to clean the valve and the wand.
  5. Empty and drain.

How do I get started on a spraying program?

This video shows how to grow more vegetables, beautiful flowers, and maintain a weed-free lawn. All it takes is just a few minutes each weekend.