The Sam Phran Flood of 2026 (B.E. 2569)

According to Thai PBS on 29 September 2026 (B.E. 2569), the Tha Chin River overflowed its banks and flooded homes in Sam Phran district. At gauging station T.14 the water stood about 46 centimetres above the bank. Pumps were set up inside the Sam Phran market community and residents moved their belongings to higher ground. The causes were continuous rain, run-off from the north and a high sea tide, with the tide peaking at about 06.00 to 09.00 (source: Thai PBS, 29 Sep 2026).

The national picture was just as serious. Data from the Department of Disaster Prevention and Mitigation (DDPM) as of 06.00 on 7 October 2026 (B.E. 2569), published by the Government Public Relations Department (PRD), showed 27 provinces plus Bangkok affected, covering 123 districts and 984 subdistricts, with 1,154,875 households and more than 3.1 million people affected (source: PRD, DDPM data as of 7 Oct 2026).

For riverside accommodation on the Tha Chin, those numbers translate into something very practical. Water that rises and falls with the tide soaks the riverside terrace, the jetty, the garden and the ground-floor rooms again and again. Even when the river drops in the afternoon, it can come back the next morning. Moisture therefore lingers far longer than in a flood that comes and goes once, and that is exactly the condition germs and mould like best.

Example Case: A Small Tha Chin Resort Racing a Long Weekend

Note: this is a typical scenario based on situations that commonly occur at riverside accommodation after flooding. It does not describe any specific person or business.

Ek runs a twelve-cottage resort not far from Sam Phran market. Its selling points are wooden cottages on the water, balconies where guests watch boats pass, a small cafe under a large tree, and a lawn where people love to take photos at sunset. When the Tha Chin overflowed at the end of September 2026, water covered the garden, the car park and the three lowest cottages. Staff carried mattresses, curtains and appliances to higher ground, and guests with bookings had to be called one by one to reschedule.

When the water began to fall, it left a thin layer of brown mud on every wooden floor, a musty smell in the ground-floor rooms, rubbish caught along the fence and a tide mark on the walls at about shin height. Five housekeepers started cleaning room by room with mops, buckets and a small pump-up sprayer normally used for watering plants. After two days, fewer than half the rooms were done, and the garden, car park, boardwalk and linen store had not even been touched. The long weekend was getting closer, and guests were already asking on the resort's page: "The water is down now. Is the resort clean and safe yet?"

That question is the heart of the problem. Guests do not just want a room that looks clean. They want to know that the property has been cleaned and disinfected properly and systematically after the flood. Ek started looking for a faster tool his own team could use again in future years.

Flood-Borne Germs in Hotels and Resorts

Floodwater that has passed through streets, drains, farmland and neighbouring communities before reaching a hotel usually carries many kinds of contamination. When the water recedes, that contamination is left behind on floors, walls, furniture and absorbent materials. The main groups of germs to understand are these.

Bacteria

Floodwater mixed with sewage can carry E. coli and Salmonella, which are linked with diarrhoea and food poisoning. Another organism to watch for is Leptospira, which causes leptospirosis, known in Thailand as "rat urine disease". The risk is found in standing water and mud contaminated with animal urine, so staff who wade through water or shovel mud without rubber boots face a higher risk than other people.

Viruses

After a flood, people often crowd together in shelters, relatives' homes and temporary lodging. Gastrointestinal viruses such as norovirus and rotavirus spread easily through hands and contaminated surfaces, while respiratory viruses such as influenza and RSV spread well wherever many people share the same space. Hotels and resorts have guests coming and going every day, so shared touch points such as the reception counter, door handles, stair rails and dining tables need extra attention.

Mould

Mould is what accommodation owners fear most. It creates the musty smell guests notice the moment they open a door, and it can trigger allergies, coughing, sneezing or wheezing in people who are sensitive to spores. Mould begins to grow on wet materials that do not dry within one to two days, whether that is gypsum board, carpet, wooden door frames, mattresses or curtains. Public health agencies such as the CDC therefore advise cleaning and drying as quickly as possible after the water goes down.

One point matters above all: the sprayer is not what kills germs. The disinfectant does that. A good sprayer helps the disinfectant reach surfaces evenly and quickly, but how well it works depends on the type of product, its dilution and the contact time on its label.

The Problems Hotels, Resorts and Homestays Face After the Water Recedes

Large and varied areas

A property is not just bedrooms. It has a lobby, restaurant, kitchen, linen store, laundry, wooden walkways, a jetty, gardens, perhaps a pool, a car park and staff quarters. Each has different materials and needs a different cleaning method, and together they add up to thousands of square metres. Doing everything by hand takes days.

Every closed day is lost revenue

Accommodation carries fixed costs every day: wages, utilities and upkeep. If recovery drags on, the long weekend that brings in the most income can slip away. A tool that shortens the time needed to disinfect large areas has a direct effect on how soon you can reopen.

Online reviews and reputation

Today's guests write reviews the moment they check out. One sentence such as "the room smelled musty" or "there was still mud on the floor" can depress bookings for months. A property that can clearly say it removed the mud, dried the buildings and disinfected every common area after the flood builds far more confidence.

Water returning with the tide

In Sam Phran, where the sea tide pushes up the river, recovery work may need to be done more than once if water comes back after cleaning. A fast tool that can be used repeatedly is worth more than relying on manual labour alone.

A small team

Most homestays and small resorts have only a few staff, often with flooded homes of their own. Any tool that lets one person do more matters.

Why Pump-Up Sprayers, Mops and Spray Bottles Are Not Enough for a Whole Property

Mops, buckets, cloths and spray bottles are always needed for scrubbing and wiping touch points. But when the job is to spread disinfectant evenly over a large area, they have clear limits.

• Too slow. A pump-up sprayer needs constant hand pumping. Its droplets are usually large and do not travel far, so the operator has to walk up to every spot.
• Poor coverage. Gaps under wooden decks, behind cupboards, under beds and inside garden shrubs are hard to reach with a bottle or a pump-up sprayer.
• Wasted product. Large drops run off and pool on the floor instead of settling on surfaces as a thin film.
• Tired staff. Pumping and carrying bottles all day wears people out, and quality usually drops in the afternoon.
• Hard to track. When everyone uses different equipment, planning zones and recording which areas have been treated becomes difficult.

A motorised backpack mistblower fills this gap. Air from the machine's fan carries the disinfectant droplets further and spreads them more widely, so one operator can cover more ground in less time.

The SOLO PORT 423: An Answer for Large-Area Disinfection in Hospitality

The SOLO PORT 423 is a motorised backpack mistblower made by SOLO Kleinmotoren GmbH of Sindelfingen, Germany, and sold in Thailand by World Health Disinfection (WHD). It is designed for large-area spraying, using a high-speed fan to carry droplets far and evenly. That makes it a good fit for organisations that look after many areas at once, such as hotels, resorts and groups of homestays.

Key specifications according to SOLO

Source: SOLO manufacturer data for the PORT 423. Actual results vary with nozzle and settings.

Features according to WHD's product information

• Made in Germany with MAHLE parts, a BING carburettor and a wear-resistant Nikasil cylinder.
• WHD describes the output as ULV with droplets under 30 microns, which saves chemical, according to WHD's product information. Actual droplet size depends on the nozzle and setup.
• A long nozzle for distance and a wide-angle diffuser for close work, on a rotatable spray tube.
• A UV-resistant translucent tank so you can see the liquid level, with a wide filler opening.
• A one-hand control lever for throttle, dosing and stop.
• A padded harness and four anti-vibration mounts to reduce fatigue on long jobs.
• Optional kits exist in the SOLO range for specialised work; ask the dealer for details.

It is not a thermal fogger

Many people search for a "fogging machine" or "thermal fogger" when they want to disinfect or control mosquitoes. The SOLO PORT 423 is a mistblower, not a thermal fogger. A thermal fogger uses heat to turn the liquid into white smoke. The SOLO PORT 423 uses air to break the liquid into fine droplets and blow them out. There is no smoke and the liquid never passes through a combustion chamber, which makes it well suited to applying water-based disinfectant to surfaces over large areas.

The disinfectant does the killing; the machine does the spreading

Whether disinfection works depends mainly on the product. Use a properly registered disinfectant suitable for hotel surfaces, diluted strictly according to its label, for example Chemgene HLD4H, which WHD sells. Always remove the mud first, because soil and organic matter greatly reduce how well any disinfectant works.

10 Reasons Hotels, Resorts and Homestays Should Own a SOLO PORT 423

1. Fast coverage outdoors. Gardens, car parks, boardwalks and jetties are wide areas, and a horizontal reach of about 12 m according to SOLO means far less walking from spot to spot.
2. A 12-litre tank means fewer refills. Less time walking back to refill, longer working runs.
3. Strong airflow reaches into gaps. Up to 1,400 m³/h of air helps carry droplets under decks, beneath eaves and into shrubs.
4. Fewer people needed. Housekeepers focus on washing, wiping and resetting rooms while one trained operator treats the common areas.
5. Ready whenever the river rises. Properties on the Tha Chin may face repeated high tides. Owning a machine means never waiting in a queue.
6. Useful all year. Beyond floods, it supports your hygiene plan during the rainy season or outbreaks, with a suitable product. See SOLO PORT 423 details
7. Durable German build. MAHLE and BING components and a Nikasil cylinder, according to WHD's product information, suit heavy use over many years.
8. One-hand control. The operator can change throttle and dosing instantly when moving from an open lawn to a narrow walkway.
9. Clear communication with guests. You can tell guests that your property has its own disinfection procedure for common areas after floods, which supports bookings.
10. Local support in Thailand. WHD advises on choosing disinfectants, operating the machine and maintenance. Call 065-556-6294 or LINE @whd268. Request a SOLO PORT 423 quotation

Before and After Owning a SOLO PORT 423

Step by Step: Disinfecting a Hotel or Resort After the Flood

Step 1: Check the site is safe

Before entering, cut power to flooded zones and have a qualified person inspect sockets, cables and distribution boards. Check that wooden decks and jetties can still bear weight, and watch for snakes, centipedes or scorpions that may have sheltered in rooms.

Step 2: Divide the site into zones

Draw a simple plan: guest rooms, lobby and restaurant, kitchen and linen store, garden and jetty, car park. Decide which zones must reopen first and who is responsible for each task.

Step 3: Remove debris and mud

Clear rubbish, branches and damaged items first. Then shovel and hose mud off floors, walls and walkways while wearing rubber boots, rubber gloves and a mask.

Step 4: Sort absorbent materials

Mattresses, carpets, curtains, pillows and upholstered furniture that were soaked should generally be considered for disposal, because they are hard to clean thoroughly and harbour mould. Wash washable fabrics hot, following product instructions.

Step 5: Wash with water and detergent

Wash hard surfaces with clean water and detergent to remove as much dirt and organic matter as possible before applying disinfectant. This is the most important step, because disinfectant works best on clean surfaces.

Step 6: Ventilate and dry

Open doors and windows and use fans and dehumidifiers to speed drying. The faster things dry, the less chance mould has to grow.

Step 7: Prepare the disinfectant and machine outdoors

Dilute the disinfectant according to its label and read its Safety Data Sheet (SDS). Refuel outdoors with the engine off and fully cool. Fill the 12-litre tank, check caps and hoses, and start the machine in the open, away from guests and other staff.

Step 8: Spray zone by zone with the wind

Start with outdoor areas such as the garden, car park and boardwalk. Walk so that the wind carries droplets away from you. Use the long nozzle for open areas and the wide-angle diffuser for close work, and reduce throttle near walls or furniture so droplets settle as a thin film rather than running off. Indoors, use an engine-driven machine only with adequate ventilation, or switch to wiping and small sprayers instead.

Step 9: Wipe shared touch points again

Door handles, key cards, remote controls, light switches, the reception counter and dining tables should be wiped again with a product suitable for each surface, since guests touch them most often.

Step 10: Respect contact and re-entry times

Leave the disinfectant on surfaces for the contact time on its label. Keep guests, uninvolved staff and pets out until the re-entry time has passed, then ventilate. Record the date, zone and product used, rinse the tank and nozzle with clean water as the manual describes, and store the machine somewhere dry.

Safety When Using the SOLO PORT 423 at a Property

• Hearing protection. Sound pressure at the operator is 97 dB(A) according to SOLO. Always wear earmuffs or earplugs, and warn any remaining guests about noisy periods in advance.
• Vibration. Limit continuous operating time, take regular breaks and rotate operators on long jobs.
• Chemical PPE. Wear chemical-resistant gloves, goggles or a face shield, a respirator suited to the product label, long sleeves or coveralls, and boots. Follow the label and SDS strictly.
• Refuelling. Refuel only with the engine off and cool, outdoors, away from flames, kitchens and smoking areas.
• Weight. Dry weight is 11.0 kg according to SOLO. With a full 12-litre tank it weighs about 23 kg or more. Adjust the harness snugly, lift correctly and take care on slippery wooden floors after the flood.
• Keep people and animals out. Never spray toward people, pets, fish ponds or food. Cordon off the zone and put up signs for guests.
• Re-entry times. Follow the product label's re-entry time before guests or staff return.
• Training. Operators should be trained in operation, maintenance and safe chemical handling, and should read the manufacturer's manual first.

Buy a Machine for Your Property, or Hire a Disinfection Service?

For resorts and hotels in areas that flood repeatedly, like the Tha Chin riverbank in Sam Phran, owning a SOLO PORT 423 lets your team respond immediately and use the machine year-round as part of your hygiene plan. Properties without available staff, or that do not want to buy equipment yet, can use WHD's disinfection spraying service as a separate option and contact WHD directly for details.

Frequently Asked Questions About Disinfecting Hotels and Resorts After a Flood

What is the SOLO PORT 423 price, and can a hotel get a quotation?

The price depends on configuration, accessories and quantity. Please contact WHD for a quotation on 065-556-6294 or LINE @whd268, or view the SOLO PORT 423 product page.

Does a flooded resort need disinfection, or is washing enough?

Removing mud and drying are essential and cannot be skipped. Applying a registered disinfectant after washing adds another layer by reducing germs left on surfaces, which is especially sensible in areas many guests and staff share.

What is the difference between a backpack mistblower and a thermal fogger?

A thermal fogger uses heat to turn the liquid into smoke. The SOLO PORT 423 uses air to break the liquid into fine droplets and blow them out, with no smoke, which suits applying water-based disinfectant to surfaces over large areas.

Can I use the SOLO PORT 423 inside guest rooms?

It is mainly designed for large and outdoor areas, because it is a petrol engine that produces exhaust and noise. Indoors you need good ventilation, nobody present and reduced throttle. For small rooms, wiping or small sprayers may work better alongside it.

When should disinfection start after the Sam Phran flood of 2026 (B.E. 2569)?

Start once the water has gone down, the site is safe, the electrics have been checked, and debris and mud are cleared. If the tide could bring water back, follow local announcements and be ready to repeat the work.

Which disinfectant should I use after a flood?

Use a properly registered disinfectant suitable for your surfaces, diluted per its label, such as Chemgene HLD4H sold by WHD. Read the label and SDS every time.

How heavy is the machine with a full tank?

Dry weight is 11.0 kg according to SOLO. With 12 litres of liquid the total is about 23 kg or more, so assign fit, trained operators.

Can guests check in right after spraying?

No. Wait for the contact time and re-entry time on the product label, and always ventilate first.

What PPE does the operator need?

Earmuffs or earplugs, chemical-resistant gloves, goggles or a face shield, a respirator suited to the product label, long sleeves or coveralls, and boots.

Is there a disinfection service if we do not want to buy a machine?

Yes. WHD's disinfection spraying service is available as a separate option. Call 065-556-6294 or LINE @whd268.

Get Your Property Ready to Welcome Guests Again With the SOLO PORT 423

The 2026 (B.E. 2569) flood on the Tha Chin may not be the last. A German-made backpack mistblower on site helps your team recover faster and be ready every rainy season. Ask about specifications and accessories, and request a quotation today.

View SOLO PORT 423 and Request a Quote

Call 065-556-6294 | LINE @whd268

Related Articles and References

• SOLO Port 423 backpack mistblower against dengue outbreaks, for municipalities and TAOs (Thai)
• Spraying against emerging diseases with the SOLO Port 423, for provincial public health offices (Thai)
• Chemgene HLD4H disinfectant
• WHD disinfection spraying service
• Thai PBS (29 Sep 2026): https://www.thaipbs.or.th/news/content/558791
• PRD, DDPM data as of 7 Oct 2026: https://www.prd.go.th/th/content/category/detail/id/33/iid/548715
• CDC flood guidance: https://www.cdc.gov/floods/