To help you choose, here are the main advantages of each:

Piston Pumps	Diaphragm Pumps
Lightness Ease of portability Cheaper parts	Motor is virtually maintenance free Less wearing parts More control over pressure settings Less downtime

Air-assisted and HVLP (High Pressure, Low Volume) pumps are ideal for onsite spraying of enamel, varnish, stains etc.

Here are the main advantages of each:

Airless - Air Assisted Pumps	H.V.L.P. Pumps
Minimal overspray, ideal for onsite spraying Air assisted means fine atomisation of sprayed material giving highest quality finish Ability to spray unthinned material Able to draw from any size paint drum Covers large areas fast No pot on gun makes it much lighter to handle	Minimises overspray, ideal for onsite spraying Fully adjustable fan pattern Small and portable Superior finish to airless when spraying fine-finish materials such as gloss enamel, stains, varnish etc Hot air assists drying of paint

Other specialist pump types include electrostatic for coating "fiddly" parts and air-driven pumps for the safe spraying of flammable materials.

If you need more help to make the right decision please feel free to contact us for specialist advice for your particular application requirements.