Alosta Plumbing, Heating & Air Conditioning
Company Overview
Since 1965, we have proudly operated as a family-owned company. We cater to the San Gabriel Valley and San Bernardino County. Customer satisfaction is our top priority at Alosta, and we guarantee it every time. We consider our customers family at Alosta. Business owner Patrick O'Mahony demands top performance from his employees. We are excited to offer high-quality plumbing, heating, and air conditioning services at Alosta.
We specialize in a wide range of services, from small fixes to custom setups. Alosta Plumbing, Heating & Air Conditioning, a family-owned company since 1965, has performed thousands of jobs, always guaranteeing our work.
Business Services
- Plumbing inspection
Business Location & Hours
Mon: | 8:00 AM - 5:00 PM |
Tue: | 8:00 AM - 5:00 PM |
Wed: | 8:00 AM - 5:00 PM |
Thu: | 8:00 AM - 5:00 PM |
Fri: | 8:00 AM - 5:00 PM |
Sat: | 8:00 AM - 5:00 PM |
Sun: | Closed |
Recommended Customer Reviews

Pat and his son came out on a Sunday to give us an estimate. Completed the entire job 2 days later. New air conditioner, heater, new thermostat, and even added a vent upstairs. He showed up when he said he would, and finished the same day. All for a great price. Hard to find someone reliable and affordable these days.

I needed help getting my heater started. I called and Patrick was out within the hour. He primed the unit and got it started. He charged $100 for the service. A little pricey in my book, but his response time was great. Thank you Patrick.

really quick and reliable help with central air cleaning and diagnostics. Would call them again

I highly recommend Alosta for your plumbing needs. They re-piped my house in the mid-90's. At that time it was Pat, at least one brother and another family member. They did very good work at a fair price and it did not hurt that they had a good sense of humor. Naturally they were the first plumbers to cross my mind when I needed to replace my old water heater (2010).
Pat and his son did the water heater and they were as professional and friendly as I remembered. Their price is still competitive but the important thing is -- I trust them.
After they removed the old unit I noticed two rather large holes in the wall where the pipes entered the house (I could just imagine what crawls into those holes at night). Pat noticed them too and patched them at no cost.
Trusted and recommended.