I used two P* LNB's for awhile that were completely submerged in Katrina floodwaters for two days. They're pretty tough. You will find, however, that they arent very efficient. I replaced my stock P* LNB's with a ASC 321 single linear lnb and picked up 10-15 signal quality points, on an 84E reflector. On my 1m 'round' dishes I use single output Hughes LNB's with the standard feedhorns. They are OUTSTANDING. :up