I have a stanley 1800s pressure washer and I can't get the soap

There should be a 1/4" hose nipple on the pump which will connect to the soap dispenser with a 1/4" line.

soap dispensers only work wit no or low pressure nozzels. when you have high pressure nozzles there is too much back pressure for the soap dispenser to function ..

A common mistake made when using the soap pickup function on pressure washers is to use one of the high pressure tips, usually green, white, yellow or red. If you are using one of these there will be too much back pressure in the line for the soap dispenser to work. You have to use the low pressure, soap tip, usually black, for this function to work.

Most people make the mistake of using a high pressure tip on their power washer while trying to get the soap dispenser to work. These tips are usually red, green, white or yellow and they cause too much back pressure at the dispenser for it to work. You need to use the soap tip, they're usually black, for the dispenser to work properly.

it will only draw soap when your using the large fitting they don't draw with the high pressure nozzles

I have a SIMONIZ S2000 electric. I bought the unit about 8 weeks ago used it once. On the second use yesterday the unit didn't work as well, the pressure seemed only a bit better than hose pressure and soap did not dispense at any pressure. SO.... after much thought I turned the hose/tap pressure down so that I only got about 2-3 GPM instead of the typical 5-6GPM normally coming out of my hose....... it worked! Soap dispenses and spay is way better! It seems that if if the inlet hose pressure is high the pump doesn't work as well... go figure.

I have a SIMONIZ S2000 electric. I bought the unit about 8 weeks ago used it once. On the second use yesterday the unit didn't work as well, the pressure seemed only a bit better than hose pressure and soap did not dispense at any pressure. SO.... after much thought I turned the hose/tap pressure down so that I only got about 2-3 GPM instead of the typical 5-6GPM normally coming out of my hose....... it worked! Soap dispenses and spay is way better! It seems that if if the inlet hose pressure is high the pump doesn't work as well... go figure.

Also, be sure the cap is turned to the direction that lets the soap in. It has a gradation on it and if it is turned all the way to the smallest (cap fully closed) very little soap will be injected into the stream.

most soap dispenser systems will only work on low pressure. depending on what washer you have. on most machines, you can switch to low pressure by either turning the nozzle on the end of the lance, or sometimes the nozzle section of the lance can be pulled out, and pushed in to alter the pressure. I hope this helps you out,

Nozzle dirty, clean out nozzle with small diameter wire. Soap dispensing only happen at nozzle low pressure setting