I'll keep saying it.. the zeagles keep going.. going...going. I've been using my same hp seat for 3 years in my FH7 beater and I just blew 200cuft+ through it cleaning my house, car, and garage last weekend full blast...the FH7 had a pretty snowy white patina, was ice cold, and kept going, and afterwards still locked up and stabilized and rose 1psi after 30seconds... how do you beat that.. on a 3 year old seat.. which sees 4000-4200psi and I beat the hell out of it.
I also keep one in my living room with an hp100 as my 11yr old son has asthma so he uses it for his nebulizer. Another I keep in my car, and I have another right now on a 3L steel pumped to 4200 I was carrying around to dust off machinery with earlier. Its just a rock solid reg, and if I want to use it with my nail guns I'll dial it down to 100psi and do that as well...
I only rebuild it them I flood or see the din oring flatten as I figure the inner rings are in the same shape and then I O2 clean and coat all the innards with Tribolube EPO2 and keeps perfect. Even if you flood and blow water through it as the EPO2 is just worth it to keep everything from going nasty. I have 4, and I'm about to get another. I usually keep them all tuned to 137IP so I can swap my seconds without adjusting the 2nd's and use both apeks and zeagle 2nd's with them.