Piston pumps

The system is composed of a double acting piston pump placed into a protection frame and is suitable for wellpoint dewatering systems or horizontal drainage with hoses.


Ground water dewatering

Ground water dewatering


How the THOR piston pump works


  • Automatic dry priming
  • Can run dry indefinitely without risk of damage or excessive wear of parts
  • High efficiency: 93%
  • Reduced and easy maintenance


  • gear casing top inspection cover with double handgrip
  • helical gear wheels in GJS 400 ductile iron
  • steel cylinder with nickel coating for highest wear resistance (900 HV)
  • piston rod in AISI 316 stainless steel (instead of AISI 304 of competitors

Inspection covers for valves, side and bottom of the pump casing

Removable suction filter and side inspection covers

Product pictures

Product range

Model Qmax   Motors
THOR 60  60 Electric-Diesel
THOR 90  90





The next ACHEMA takes place from the 11th to the 15th of June 2018. This international exhibition is the leading World forum for chemical engineering and process industry.  Varisco awaits you with important news and will be pleased to show its ...

RemTech 2016

RemTech is the most specialized event in Italy on contaminated sites remediation and territory protection and requalification. It is characterized by a very accredited exhibition area, a high-level technical and scientific conference session, training courses for ...

Geofluid 2016

The next Geofluid takes place from the 5th to the 8th of October 2016. This international exhibition is the most important specialized event dedicated to the operators of drilling and underground works.  Varisco awaits ...

Varisco delivers 20 Albatross for the TAP project

The Trans Adriatic Pipeline (TAP) will transport Caspian natural gas to Europe. Connecting with the Trans Anatolian Pipeline (TANAP) at the Greek-Turkish border, TAP will cross Northern Greece, Albania and the ...

SIM 2015

The Congress of the SIM (Société de l'Industrie Minérale) meets every year the managers for the exploitation of mines, quarries, industrial minerals and recycling platforms.  Varisco awaits you from the 21st to the 23rd of October 2015 in Mons ...

New Youtube channel !

Varisco S.p.A. is now online with a new Youtube video channel to communicate dynamically and inform its customers on new products and the technological features of its pumps, showcasing their many applications in actual operating environments.   For ...

New Simplex separator

To be a leader in a market such as vacuum prime centrifugal pumps you need to constantly innovate your own product.  Varisco in 2015 introduced the new SIMPLEX separator, a solution with innovative features and many benefits that differs from all ...

Varisco is the new exclusive distributor for Grindex in Italy

In the last five years in Europe all market have experienced strong upheavals and very strong was the contraction of the construction sector. Despite this the best organized companies were able ...