single handle faucet repair

x-no-archive: yes
I have a Gerber single handle shower faucet, model 49-700, it leaked. It has two washers, one for the hot and one for the cold. I wanted to buy new washers, but I was told they weren't available and I had to buy the cartridge. So I bought the cartridge and used the old spindle. When I got it all back together, I could change the water from hot to cold, but I couldn't turn it off. The spindle goes through a big plastic piece, and through a spring with plastic washers on either end. I thought the spring wasn't compressing enough, so I tried stretching it, but that didn't help. Luckily there's two other spindles for a normal faucet, I turned those off. I don't want to have wasted money on the cartridge, why won't it turn off ?
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file
Upload is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.