A post-market, non-interventional, two-arm, long-term follow-up study of patients previously enrolled in the WATER Study (NCT02505919) - which was a prospective multi-centre randomized blinded study comparing Aquablation of the prostate with the AQUABEAM Robotic System with standard transurethral resection of the prostate (TURP) for the treatment of lower urinary tract symptoms (LUTS).

The study is a post-market, non-interventional, two-arm, long-term follow-up study of patients previously enrolled in the WATER Study (NCT02505919) - which was a prospective multi-centre randomized blinded study comparing Aquablation of the prostate with the AQUABEAM Robotic System with standard transurethral resection of the prostate (TURP) for the treatment of lower urinary tract symptoms (LUTS). In POST WATER, up to 46 WATER Study subjects in the United Kingdom who were active on the study at 36 months will be invited to participate, across 3 clinical study sites in England and Wales. The study will consist of one follow-up time-point at 60 months (5 years) from the time of initial WATER Study treatment date.

Inclusion Criteria:

1. Subject was randomized and received treatment in the WATER Study.
2. Subject is mentally capable and willing to sign a study-specific informed consent form
3. Subject is willing and able to comply with all study requirements

Exclusion Criteria:

Dementia or psychiatric condition that prevents the participant from completing required follow up 2. Participating in another investigational study that could affect responses to the study assessments

The target patient population is subjects who were enrolled in the WATER Study (with symptomatic BPH) who were randomized to treatment with either the Aquablation procedure or TURP.