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Message: <blockquote data-quote="Novascotia632" data-source="post: 65881" data-attributes="member: 8429"><p>Yes you can remove the disk assy, plug the port hole and then install a pop off valve on the inlet side of your coil. Follow the hose that leads from your pump to your coil, there should be an inline tee at the coil with a threaded plug in it. Remove that plug and that is where your pop off will go. Make sure your pop off is rated for just over the max pressure of your unit. I've found that those rupture disks don't really hold up and the hotwater doesnt help. Having the pop off on the cold side makes it a bit more easy on them and if they do go the hot water in the coil will mix with the cold water from the pump when it blows lowering the temp of the water being discharged. You may also want to shove a piece of hose over the pop off and direct it towards the ground, this will make it much more safe if the valve blows off. hope this helps. If memory serves me correct there are 4 pressure ranges, 1200 max psi, 2400 max psi, 3600 max psi and 5000 max psi. They have an allen screw in them that you can turn to adjust the setting.</p></blockquote><p></p>