Product review (5 stars): Too Easy
A year ago I pull the old water pad out and took it to every hardware/Lowes/Home Depot in a 2 state area with ZERO luck.  I didn't want to call the furnace repairman for something so trivial and pay $50 for a house call and $30 or $40 for the water pad.  So I just washed the old pad and put it back in for another year.  DON'T DO THIS!  I just happened into an old friend that is in the H/C business and he said do not ever re-use the water pads because they have a coating on them to prevent mold build up!  He was right too!  I came home and pulled the 2 year old pad out and black mold was all over it!  He also mentioned to look on line and I tried good 'ol Amazon!  The 2-pack is a bonus because you are getting 2 for the price of one!  I'm good for 2 years before I WILL have to reorder this product again......