- XRP-SM – For all Berkey Light® systems manufactured in 2013 or earlier.
- XRP-LG – For all Berkey Light® systems manufactured in 2014 or later
- Please identify the manufacturing date on the Berkey® Light System to determine which size blocking plug is required. The manufacturing date may be found on the embossing on the bottom of the upper chamber. If the two-digit number in the circle is 13 or lower, the XRP-SM plug is needed. If the two-digit number in the circle is 14 or larger, the XRP-LG plug is needed
- Rubber plug for blocking unused filter holes in the upper chamber of the Berkey® Light System
- All Berkey® Light Systems come standard with the proper amount and size of blocking plugs; in case of loss or damage, replacement plugs may be purchased individually
- XRP-LG may be used with stainless steel Berkey® Systems
- XRP-LG color may vary