Alfagomma Slangpilaar Interlock G2 BSPP Inw. DN25 1" Spare parts H1222414 161600 PAV2523 1242623 blank filter Element H1222414 161600 PAV2523 1242623 H1243390 202000 PFL322090 1201847 H1720812 161600 DKRH2516G2 1254448 Alfagomma Slangpilaar Interlock G2 BSPP Inw