15 Tuner SWM Distrubution

[Custom LA]

I have SWM LNB, 7 H21 and 4 HR22 so thats a total 15 tuners. Who makes the 8 output multiswitches? and if I have 4 DVRs on one 8 output SWM multiswitche and I connect 1 wire to each DVR (8 tuners) are the other 4 outputs still useable? and if anyone can send me equipment list I need for distrubution would be much appreciated.
Thank You,

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[WK-Jeff]

You really need to get rid of the SWM LNB and get a standard 5LNB with 4 lines. Then you will be able to use multiple SWM switches and feed all of your unit units. You will need a 2 SWM chassis and 2 SWMs. The SWM8 is DIRECTV-branded and approved. You can get a total of 8 tuners from one SWM...4 DVRs maxes it out, even though you are using only 4 lines, one to each DVR. You count TUNERS, not li nes.