EX-30 Expansion Tank Air Scoop Kit

A:  I am sorry I am a little confused by your question. Every system is different. The three items in this kit are frequently used together so they are often kitted together to make purchasing easier. Therefore plumbers have become conditioned to buying them as a kit. As to circulation pumps. Pump selection is based on system design; and as mentioned every system is different. Therefore I cannot tell you if you need a pump without an understanding of how your system is or will be laid out. You are welcome to call me. We can discuss your system and perhaps with additional information I can provide you some definitive answers. Chris 978 651 3301

A:  the air scoop has 11/4" connections

A:  Yes, The expansion is sold all by itself. It is Home Depot SKU 202268962. If you put that number in the search block, on the Home Depot site, it will come up.

A:  That is a good question and very intuitive. However you must keep in mind that a hydronic heating system is what is called a closed loop system. The same water is used over and over again, hopefully for decades. Because of this all the oxygen has been removed; it is what we call dead water. No oxygen means no rust. The average tank type water heater, in climates where you have boilers, lasts 7 years. So at 7 years you are not leaving a lot of value on the tale by electively changing your water heater. In fact you may save money by engaging in a planned purchase rather than an emergency one. If an expansion tank was appropriately sized for the systems water content and BTU size the diagram will be properly positioned in the tank and will move in a proper range. This means the diagram will not flex excessively and could last for decades. Conversely if it was under sized or if the system loses water, which is replaced by portable oxygen bearing water, you could go through tanks every few years. The bottom line is don’t assume your tank needs to be changed just because of time. When the diaphragm finally rips, the systems air elimination device will remove the gas that is in the cushion side of the tank from the system. The automatic feed will add more water filling that void space. Then the next time the system heats up, pressure will build because the system no longer has a place to absorb the expansion of the water. As a result the pressure relief valve will blow off. I like to refer to it as a burp. It will continue to burp every time the system heats up. Expansion tanks are essentially binary devices. They work or they are broken. They do not typically decrease in performance over time. Chris 978 651 3301