PM, BS, S and HS series Piston Pumps were the first ever pumps to be produced by Speck-Kolbenpumpenfabrik, Otto Speck GmbH & Co. KG.
They are used in domestic water systems, water units with tanks, as well as in agriculture, industry, ships and as boiler feed pumps.
| Pump Performance | PM | BS | S | HS |
| Qmax/l | 3000 l/h | 5000 l/h | 45000 l/h | 3000 l/h |
| Pmax bar | 6 | 6 | 6 | 40 |
