Delta DeLuca Soap / Lotion Dispenser in Champagne Bronze RP50781CZ

I have two of these delta pumps in my house and at first they worked fine. After the first one had began barely pumping, I switched them out and it started pumping like it should. As did the first one when it was new. After a few months of use, it done the same thing as the other one. It matches my faucet and would hate to put something different in and faucet too. A lot of money to spend just to pump soap.

The soap dispenser started out okay, but soon started getting harder and harder to use. After pushing the dispenser down, it takes longer and longer to come back up. I followed the instructions and cleaned the dispenser with hot water to try to clean it out, but it hasn't helped. The dispenser when pushed down still take a long time to come back up and little soap comes out. I am not sure what to do, repair or replace? I would also like to find out how to get a soap funnel to fill the unit as mentioned in another review.

I was having trouble filling this with soap. The soap would back up due to bubbles and overflow. So I purchased the funnel from delta. Helps but soap still backs up into the funnel but at least you can see soap backing up and stop filling until soap recedes into the dispenser Also cannot tell when the dispenser is full. When filling I stop and put the top back in and use it as a dipstick.

Like other reviewers, having problems with the soap dispenser not working after a couple of years. Tried cleaning everything completely, but still the dispenser is hard to push down, and very slow to return to its normal up position. My wife is frustrated....

Have used Delta faucets throughout this house for 24 years without a problem/part I could not easily fix myself. New Delta kitchen faucet came with soap dispenser two years ago. Dispenser no longer pumps soap. Seems as though spring action is gone but cannot find any evidence that there was a spring. Looking at the web site at part # RP50781, RP47888, AND RP21945, but do not know what I need.