Part # U178-920P
Dimensions 1" L x 1" W x 1" D
ITEM# 5051-30 IS LISTED IN 2007 INYO SPA CATALOG PAGE I44 AS A REPLACEMENT PLUG FOR THE DJ SERIES SPA PUMP. IT IS CORRECT FOR THE CURRENT VOLUTE MFG# 17400-0105 NOW BEING MANUFACTURED. IF CUSTOMER HAS THE VOLUTE MFG# 17400-0005 THAT WAS MANUFACTURED WITH THE OLD COARSE THREAD PLUG, IT REQUIRES A INYO PART NUMBER 5051-40, MANUFACTURER# U178-940P. THE 5051-30 WILL NOT WORK FOR THE ORIGINAL VOLUTE THAT HAS THE COARSE THREAD.
Less than 1 hr
Since Inyo doesn't sell just the o-ring, I went to Lowe's and picked up a Danco #11 O-Ring (3/4" x 9/16" x 3/32") for $2.49. I lubricated the o-ring with silicon grease and hand tightened the drain plug. Result- no more leak.