ditttohead
Water systems designer, R&D
Companies that are pushing the lowest price will forgo the gravel bed in order to save a few dollars and thus be $1 cheaper than the next online company. Then they will argue against all common sense about their poor reasoning. Do not buy from these types of companies that sell soley on being the cheapest. I have read the reasoning behind no gravel, and I doubt anybody on this site, or anyone with real field experience would agree with the no gravel idea. It is purely done to save shipping costs. A 12" tank uses 15-20 pounds of gravel, these companies are so desperate to be the lowest priced guys that they will say anything that justifies their saving $5. Just because they claim to have experience and they wrote it online, does not mean its true. They also claim that replacing resin is very difficult with a gravel underbed. Please check out this poorly done video (I have not had time to edit it yet). We filled a tank almost to the top with 1/4" gravel and proceeded to use a cheap extraction tool designed for resin removal to show how these simple tools will even extract 200 pounds of gravel in a couple minutes.
[video=youtube;QegxYAfOANk]http://www.youtube.com/watch?v=QegxYAfOANk&feature=c4-overview&list=UUL7f2aKKWBuAhzru29_Wv5A[/video]
BB 20" filters have less than 1/6 of a cu. ft. of GAC, the flow rate is approximately .5 GPM for actual functioning performance. The gallon rating is based on an estimate, a pressure gauge does not tell you anything about Carbon filters other than that they are clogged, it does not tell you anything about their actual chlorine, chemical., pesticides, organcis, etc removal. Do not waste your money on whole house BB unless you are desperately trying to save a few dollars and have extremely low water usage.
Special resin that they test??? LOL, resin is cheap, it is not worth the effort to send it back to prove whos resin it is. The service tech should have just replaced the resin at a reasonable cost instead of taking back the system to his shop. The valve can be torn down in 2 minutes and inspected for damage. That valve body is easily inspected, the main damage will occur in the bore/piston area, and that can be easily seen once the piston and seals/spacers are removed.
If you click on my link below, you will see a complete 7000 tear down, it is about as complex as that valve and takes about the same amount of time. It uses the same technology, and is simply a modern version of that valve.
[video=youtube;QegxYAfOANk]http://www.youtube.com/watch?v=QegxYAfOANk&feature=c4-overview&list=UUL7f2aKKWBuAhzru29_Wv5A[/video]
BB 20" filters have less than 1/6 of a cu. ft. of GAC, the flow rate is approximately .5 GPM for actual functioning performance. The gallon rating is based on an estimate, a pressure gauge does not tell you anything about Carbon filters other than that they are clogged, it does not tell you anything about their actual chlorine, chemical., pesticides, organcis, etc removal. Do not waste your money on whole house BB unless you are desperately trying to save a few dollars and have extremely low water usage.
Special resin that they test??? LOL, resin is cheap, it is not worth the effort to send it back to prove whos resin it is. The service tech should have just replaced the resin at a reasonable cost instead of taking back the system to his shop. The valve can be torn down in 2 minutes and inspected for damage. That valve body is easily inspected, the main damage will occur in the bore/piston area, and that can be easily seen once the piston and seals/spacers are removed.
If you click on my link below, you will see a complete 7000 tear down, it is about as complex as that valve and takes about the same amount of time. It uses the same technology, and is simply a modern version of that valve.
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