Ashtecs has built a reputation for innovation and quality in the wastewater industry operating in Ireland, UK and the USA. We have over 25 years of experience in wastewater treatment systems and soil infiltration systems.

Ashtecs has been responsible for introducing many innovative products and technologies to the Irish and UK market and has contributed to the research and development leading to significant improvement in national product standards in this sector. 

Who Are We? 

Ash Environmental Technologies (Ashtecs) was founded in 2004 by Joe Walsh primarily servicing the Irish onsite wastewater industry. Since then, Ashtecs has expanded to provide services to all of Ireland and UK, with a focus on quality, innovation and integrity. 

We select like-minded quality industry professionals to combine our expertise to provide integrated collection, treatment and dispersal systems with ongoing operation and management to ensure a long and sustainable lifespan. 

Ashtecs has a team of certified installers that will ensure your system installation is of the highest quality. 


joe walsh

Managing Director

25+ years experience with wastewater projects at CEO level in Ireland and in the USA; co-founder of the Irish Onsite Wastewater Association.

colm penston

construction manager

30+ years experience from site foreman to project manager on international engineering and petrochemical projects – many €300M+ value.

Neil walsh

engineering project manager

Civil Engineer with 10+ years experience in project management of water treatment, pipeline and pump station projects with values ranging from €250K - €20M.


The Irish Onsite Wastewater Association was co-founded in 2007 by Billy Moore and Joe Walsh.  Joe is past Chairman and current committee member. He is also Chairman of the Wastewater Engineering Standards Committee of the National Standards Authority of Ireland (NSAI) that monitor and develope national and European standards. 



Ashtecs staff are recognised as experts and innovators on all aspects wastewater in Ireland and specifically recognised as experts on drip distribution, also known as drip dispersal systems.

Ashtecs designed and supplied the Drip Distribution and Low-Pressure Pipe (LPP) systems used in the 2016 EPA funded research report 161 carried out by Trinity College researchers on new wastewater treatment technologies, resulting in the addition of LPP and Drip Distribution to the new EPA Code of Practice and regulatory standards.

US experience

In the USA Joe is past Steering Committee Chairman of NOWRA, the US National Onsite Wastewater Recycling Association, and Technical Practices committee member. He has participated in innovative technology research projects both in Ireland and in the US and presented the findings to technical conferences. He introduced the Irish team researching new Irish procedures for site assessment to his US contacts, the outcome of which is now our Irish site characterisation programme.



Joe has authored various articles, including an article published by Engineers Ireland Journal explaining the Drip Distribution and LPP technologies which were successfully evaluated by Laurence Gill and his research team at Trinity College on behalf of the EPA and now added to the wastewater Code of Practice.