Your pool nozzles push filtered water back into the basin while the floor drain pulls it out again. Together they keep circulation moving, chlorine distributed evenly, and debris from settling on the bottom. In Sanur's salty coastal air and long rainy season both parts wear faster than you might expect — here is what to check and when to call a technician in.
What Nozzles and the Floor Drain Actually Do
The return nozzles are where clean, filtered water re-enters the pool. Most Sanur villas have four to eight of them set into the side walls at roughly mid-depth. Their job is threefold: restore flow after the filter pump, spread chlorine so every corner gets treated, and create gentle surface agitation that helps evaporate excess moisture.
The floor drain sits at the lowest point of the pool bottom. It collects water and anything heavy enough to sink, then sends it through an underground pipe toward the skimmer line and the filter pump. In older villas built in the 90s or early 2000s the drain plumbing can be a simple PVC elbow with no basket, which means leaves and sand travel straight toward your pump impeller.
- Nozzles = water back IN to the pool
- Floor drain = water OUT to the pump
- Both work as one continuous circulation loop
Spotting Leaks Around Nozzles and the Drain
A slow leak around a nozzle usually announces itself first as a dark ring on the tile or a patch of white mineral crust just below the fitting. If you run your hand over the area while the pump is off and feel dampness that was not there yesterday, the gasket or thread seal has likely failed.
At the floor drain, look for soft or spongy plaster within about thirty centimetres of the grate. That often means water is seeping behind the concrete base plate. Because Sanur's sea air accelerates corrosion on any metal component — brass fittings, stainless screws — check those connections at least once a year.
Safety note: if you see water pooling near the pool electrical panel or the pump junction box, stop what you are doing and switch the breaker off before touching anything wet. Call a licensed electrician or your plumber; do not troubleshoot live wiring yourself.
Send me a clear photo of the fitting on WhatsApp and I will tell you whether it needs a simple reseal, a new part, or a full plumbing look-over before you book anything else.
Replacing a Worn Nozzle or Drain Fitting
You will know it is time to replace rather than reseal when the body is cracked, the threads are stripped, or a leak persists after two careful re-tightenings with fresh PTFE tape or thread-sealant compound.
The basic sequence: lower the water level below the nozzle (or drain the pool partially for the floor drain), shut off the filter pump and close the isolation valve if one exists, disconnect the pipe with an adjustable wrench, clean old sealant from both ends, apply new sealant, reassemble, refill, and run the pump for twenty minutes while you watch for drips.
If your villa uses well water instead of PDAM mains, expect more calcium and iron staining on the threads over time. A quick wipe with white vinegar before applying new sealant makes a real difference in how long the joint holds. The cost of parts and labour depends on the specific fitting and access difficulty — send photos on WhatsApp and the technician will quote from those images.
- Lower water first — never work above the waterline dry
- Shut off the pump AND isolate the supply line
- Clean all old sealant before applying new material
- Run the pump 20 min and inspect every joint
Clearing Clogs After the Rainy Season
Between October and March, Sanur's downpours wash leaves, small insects, and fine sand into every open fitting. Nozzle tips clog with a mix of calcium carbonate and algae; the floor-drain basket fills to the brim within a week of heavy rain.
To clear a blocked nozzle, unscrew the tip (most are hand-tight) and soak it in warm white-vinegar solution for thirty minutes. A soft toothbrush works well for stubborn mineral build-up. Never use a metal wire inside the orifice — you will scratch the flow channel and create turbulence that throws chlorine unevenly across the surface.
At the drain, lift out the grate and basket, rinse under a hose, and check the pipe below with a flexible pool brush. If the blockage is deeper than about a metre, it is safer to have a technician snake the line rather than risk cracking an old PVC joint.
Safety note: do not add chlorine or any other chemical while you are working on fittings. Mixing bleach-based products with vinegar or ammonia releases toxic gas. Let the area dry and ventilate fully before dosing again.
Adjusting Nozzle Direction for Better Circulation
Most return nozzles come with a swivelling tip. Give it a quarter-turn clockwise or counter-clockwise and the jet angle changes by roughly fifteen degrees. The goal is to aim each nozzle at the opposite wall or slightly above the waterline so the current sweeps across the surface and down the far side, pulling debris toward the skimmer and floor drain.
If two adjacent nozzles point in the same direction you get a dead zone behind them where algae loves to settle. Stagger the angles so the flows cross gently in the middle of the pool.
The floor-drain grate itself is fixed, but make sure it sits flat and level. A twisted grate creates a small vortex that can pull air into the pump line and cause the impeller to cavitate — you will hear a grinding rattle from the pump housing.
- Aim nozzles at opposite walls for full coverage
- Stagger angles to avoid stagnant dead zones
- Check the grate is flat — a tilt causes air ingestion
Questions
How often should I inspect my pool nozzles in Sanur?
Once every three months is sensible given the salt-laden coastal air. After any particularly wet month, do a quick visual check for mineral crust and loose fittings while you are cleaning the basket anyway.
Can I just tighten a leaking nozzle instead of replacing it?
If the leak is at the thread and the body is intact, yes — shut off the water, re-tighten with fresh PTFE tape or sealant, and monitor for a week. If there is a crack in the plastic body or the gasket channel is deformed, tightening will not hold; plan a replacement.
My floor drain smells bad after the rainy season. Is that normal?
It usually means organic matter such as leaves and insects has been sitting in the pipe below the basket and starting to decompose. Flush the line with clean water from a hose, let it run through the filter pump for ten minutes, and dose a small amount of algaecide into the skimmer. If the smell persists, have the underground line inspected by a technician.
I'll reply with what's needed, a price and when I can come.
