Item 7011332 has must read information.
: Per Helac complete valve block 7017101 is no longer available and has been replaced with 7017183. When replacing complete valve block these are directly interchangeable, but the cartridges are NOT interchangeable between the two valve blocks. If ordering 7011332 cartridge, first verify the p/n stamped on the valve block. Replacement as follows: 7017101 is stamped with Helac p/n 24736 - If customer has this original valve block on their machine they should still order the original cartridges p/ns 7011331 and 7011332. 7017183 is stamped with Helac p/n 27600 - If customer has replaced original valve block(7017101) on their machine with 7017183 valve block they should order cartridge p/n 7017193 (this valve block use 2 of the same cartridge.) See attachment for Helac service bulletin. 
Attachments: 7017101 vs 7017183 Helac Service Bulletin 

VALVE, CHECK

$67.10
:

:
7011332

:
: 4.3  : 2.6  : 1.7  : 0.2

:
EA
:
:
VALVE, CHECK - 7011332