The faucet started leaking inside the sprayer and I can't get it apart to see if it can be fixed. It is leaking back down the hose and into the cupboard below the sink. I would like to be able to replace the "Double Function Shower" faucet. The item number is 21 on your instruction booklet. This is suppose to have a Lifetime Limited Warranty. The faucet model is 673-7410 It was purchesed on July 16th, 2012 My name is Paul Knight, Phone number is [protected]. I would like to hear from you if this part is available.