You may also want to consider rebuilding the one you have now. Rebuild may not be the correct description but it's close enough. My pump was noisy too. I headed down to my local NAPA and picked up a seal kit for it, the kit was about 10 bucks. I disassembled it, cleaned everything up real good and then reassembled it using the new seals. It has been quiet ever since. There was a lot of small particles of something in the pump. I didn't use a magnet and see if the particles were metal. I just cleaned it out real good. There are a lot of small springs in them so you need to be sure to not loose any of them.