High-Pressure Jetting & Waste Removal – Drain and Manhole Cleaning

A high-pressure jetting unit consists of a water tank, a high-pressure pump, a hose reel, and interchangeable nozzles. The hose is pushed into the pipe via a manhole or access point, and the rear-facing jets of the nozzle propel the hose forward within the pipe. Simultaneously, the water jet dislodges grease, sediment, and lime scale from the pipe walls, which then flows back towards the manhole, from where it is pumped out.

The pressure and water volume are selected based on the pipe's material, diameter, and condition. An old cast-iron pipe in an apartment building basement tolerates a different regime than a new PVC line or a thick-walled concrete pipe. Incorrect pressure or the wrong nozzle can damage a pipe in poor condition, which is why the technician's assessment before work is as crucial as the machine's power.

Nozzles have different purposes. A cleaning nozzle is designed to wash off sediment and grease from pipe walls; a penetrating nozzle first creates a channel through dense blockages; a rotary nozzle tackles hard lime and grease crusts; and a root cutter nozzle severs fine roots that have grown into the pipe through joints. Often, several nozzles are used sequentially on a single job.

Hot water jetting is a distinct level of cleaning. Hot water melts grease before the jet pressure dislodges it, which is why it is primarily used for risers in multi-storey buildings and catering pipes where grease layers have solidified over years. With cold water, only the central channel can be cleared in such a pipe; hot water cleans the entire wall.

Clients almost always ask: is rodding enough? The honest answer is, it depends on the objective. Rodding is a quick and inexpensive way to restore flow. It can be carried out with lighter equipment, fits into apartments, doesn't require water supply or manhole access, and allows the family to shower again the same evening. If the blockage is caused by a random item or a localised obstruction, rodding is a perfectly sufficient solution.

High-pressure jetting is a method for restoring the pipework to its optimal condition. If blockages recur every few months, if the pipe diameter is filled with sediment, if it's an external drain or manhole, or if there's grease in the pipework – then rodding only postpones the problem. A rodded pipe's flow is often only a third of its original capacity because sediment remains on the walls and quickly accumulates a new blockage.

In practice, the best combination is: rodding quickly opens flow and saves the immediate situation, followed by planned high-pressure jetting within a few days once the initial panic has subsided. This way, the client gets an immediately usable system and then a long-lasting solution.

A third possibility is that neither helps – and this happens more often than one might think. If the pipe has subsided, fractured, has an incorrect gradient, or a joint is loose, then jetting provides temporary relief, and the problem will recur. For recurring blockages, we recommend a CCTV inspection after jetting to examine the pipe's interior, rather than jetting the same section repeatedly every year.

• Single, accidental blockage in an apartment – rodding is sufficient
• Blockage recurs 2-3 times a year – order high-pressure jetting
• External drain, manhole, grease trap – high-pressure jetting and vacuum tanker
• Apartment building riser with solidified grease – hot water high-pressure jetting
• Jetting doesn't yield results or results don't last – CCTV inspection for pipe condition

The type of property determines both the technique and the working hours. The same service can look quite different in an apartment building, a private home, or a restaurant.

• Apartment building sewage risers and basement pipework
• Apartment outlets from kitchen and bathroom to common riser
• Private home external drains from house to connecting manhole or septic tank
• Connecting, inspection, and settlement manholes
• Stormwater gully pots, drainage pipes, and stormwater lines
• Catering grease traps and kitchen pipework
• Technical pipework in shopping centres and manufacturing facilities
• Septic tanks, collection wells, and dry toilets

In apartment buildings, the sewage system is divided into two parts: the outlet from the appliance to the riser, owned by the apartment owner, and the riser and basement collection pipework, owned by the association. Most recurring blockages occur at the interface – the apartment's flat outlet gradually fills with grease over years, and the common riser collects sediment at the bend on the lower floor.

For an apartment association, planned high-pressure jetting means three things simultaneously. Firstly, most emergency call-outs, which occur at night and cost significantly more, are eliminated. Secondly, the risk of sewage backing up into lower-floor apartments is reduced – this damage takes months to process between insurance and the association. Thirdly, maintenance costs are known in advance and fit into the budget.

During the work, we usually move upwards from the basement: first cleaning the horizontal collection pipework, then the risers via the roof or upper-floor inspection access. Residents must be informed because the sewage system cannot be used during cleaning, and in some apartments, short-term odours or splashes may occur from drains if a water seal is absent. We agree on the schedule and notification with the association during the quotation stage.

If the building has undergone partial riser replacement or apartments have been renovated at different times, the pipework is a mix of old cast iron and new plastic. Such transitions are common blockage points and should be checked separately – the result of high-pressure jetting clearly shows if the transition joint was properly made.

In a private home, the most common work area is the external drain from the house to the connecting manhole, septic tank, or public sewer. Problems in this section are almost always threefold: sediment and grease, root intrusion through joints, and a subsided section where water stagnates.

Roots are an underestimated hazard in Estonian private homes. Trees or hedges seek moisture and find the smallest imperfection in joints. Initially, root clumps only catch paper, then continuous slow drainage occurs, and finally, a complete blockage. High-pressure jetting with a root cutter nozzle can cut through these and restore flow, but if roots regrow every year, the joint needs to be excavated and repaired.

The stormwater system and gully pots require maintenance in spring after the sanding season ends. Sand and leaves accumulated at the bottom of the gully reduce capacity, block the outlet, and with the first heavy rain, water remains in the yard, in front of the garage, or flows into the basement through window wells. A vacuum tanker extracts the sediment layer, and high-pressure jetting cleans the gully walls and outlet pipe.

The same applies to drainage pipes. If the drainage around the house is filled with sand and mud, it can no longer drain surface water, and dampness problems in the foundation and basement begin slowly and unnoticed. Lower pressure and a smaller nozzle are used for drainage cleaning, as the pipework is thin-walled and perforated.

For a catering establishment, regular emptying and high-pressure cleaning of grease traps is part of the job, not an optional extra. The grease trap collects grease and food residues from kitchen wash water before they reach the public sewer. If the trap is not emptied, grease starts to move further and solidifies in the pipework – at which point it's no longer a problem of one device, but of the entire connection.

A blocked grease trap means kitchen downtime at the worst possible moment, usually during evening peak hours. The cost of downtime for one evening is often greater than a year's worth of planned maintenance. Therefore, we agree on a schedule with commercial clients and arrive before opening or after closing, so kitchen operations are not interrupted.

During cleaning, we empty the trap with a vacuum tanker, jet clean the walls and baffles, check the inlet and outlet, and refill the trap with clean water. The removed contents are disposed of. If necessary, we also clean the kitchen floor drains and the outlet up to the connecting manhole on the same visit, as grease usually reaches there too.

In retail premises and manufacturing, the specifics are more about access and time windows: a manhole might be in the car park, a storage room, or under a production line, where work can only be done at a specific time. During a site visit, we agree on access, safety, and working hours in advance to ensure the crew doesn't have to wait on site.

Waste removal service involves emptying a manhole or tank with a vacuum tanker, transporting the contents, and delivering them to an authorised disposal site. The most common sites are collection tanks, septic tanks, settlement tanks, dry toilets, and sand traps. The client's responsibility is to ensure vehicle access and indicate the manhole's location; if the manhole is under snow, soil, or a terrace, it must be cleared beforehand.

The frequency of septic tank emptying depends on the tank's capacity and the household size. For a three-chamber septic tank, a typical frequency is once or twice a year; for a collection tank, it depends entirely on water consumption. If you monitor the tank yourself, it's advisable to watch the level and order removal before it fills to the brim – cleaning an overflowing tank is more expensive and unpleasant.

A crucial technical nuance for septic tanks: after emptying, the chambers usually need to be refilled with water, as an empty plastic tank can float up in high groundwater conditions, ripping pipe joints apart. Our crew does this by default, unless the manufacturer's instructions state otherwise.

It's worth ordering manhole jetting along with emptying. Simply pumping out the liquid leaves a layer of sediment at the bottom and on the walls, and the tank will fill up faster than necessary. Jetting truly cleans the tank, and the next emptying will be due later.

The work begins with a phone call or an inquiry form. We ask about the type of property, a description of the problem, the location and access to manholes or inspection points, and whether it's an emergency or planned maintenance. Based on this information, we select the appropriate equipment: a lighter jetting unit, a large jetting truck, or a combined vacuum and jetting truck.

• 1. On-site inspection: opening manholes, assessing pipe directions and access
• 2. Work plan and confirmation: what will be jetted, in what order, estimated volume
• 3. Preparation: covering the area, safety around manholes, informing residents
• 4. Pre-emptying with a vacuum tanker if necessary, to prevent liquid overflow during jetting
• 5. High-pressure jetting with selected nozzles, section by section, until full flow is restored
• 6. Pumping out and removing sediment and waste for disposal
• 7. Inspection: water test, CCTV inspection if needed, showing results to the client
• 8. Overview and recommendations: what was found, when next maintenance is due, what needs repair

Proactive cleaning is almost always cheaper than rectifying the consequences of an emergency. Flooding in an apartment or basement causes damage to floors, partitions, and furnishings, drying costs, and disputes between neighbours – sums beside which a maintenance bill is marginal.

Recommended frequencies are as follows, but the actual schedule depends on what the pipework genuinely shows. If the first cleaning reveals a very thick layer of sediment, we shorten the interval; if the pipework is clean, the interval can be extended.

• Apartment building risers and basement pipework – every 2–3 years
• Private home external drains and manholes – every 2 years
• Stormwater gully pots – once a year, in spring after the sanding season
• Grease trap in catering – monthly to quarterly, depending on volume
• Septic tank and collection well – as they fill, usually 1–2 times a year
• Drainage pipework – every 3–5 years or if moisture problems arise

A large part of the bill is made up of time spent on travel, finding manholes, and gaining access. The more preparatory work is done, the shorter the crew's presence.

• Know where manholes and inspection openings are – mark them beforehand if necessary
• Clear vehicle access: parked cars, locked gates, snow
• For private homes, open the manhole cover in advance if it's heavy or overgrown
• In apartment associations, inform residents of the cleaning time and that water cannot be used
• Describe the problem accurately: which appliances aren't working, for how long, whether it recurs
• Keep previous CCTV inspection reports and pipe diagrams, if available

The most common mistake is excessive use of chemicals. Store-bought drain cleaners do not dissolve the grease layer in pipes but corrode old metal pipes, making subsequent work dangerous – the technician must account for corrosive mixtures in the manhole. If a product didn't work the first time, a fifth bottle won't help either.

Another mistake is pouring grease down the sink. Cold grease immediately sticks to the pipe wall after the first metre and collects everything that follows. Wet wipes and hygiene products that do not break down do the same – these are the biggest sources of blockages in modern sewage systems.

A third mistake is delaying maintenance until the system completely fails. A slowly draining sink, a gurgling drain, or an odour in the basement are early signs, prompting a crew call-out that completes the job in an hour, whereas a month later, it means an overnight emergency call-out and cleanup.

A fourth mistake is assuming that jetting will fix a structural defect. If a pipe has an incorrect gradient or has subsided, no nozzle can alter physics. In such cases, the only permanent solution is to repair or replace the section, and we will state this rather than selling another jetting service.

High-pressure jetting operates at pressures dangerous to humans, and manhole work involves dealing with sewage and gases. Therefore, the work area is cordoned off, an open manhole is only left unattended if correctly barricaded, and the crew uses protective equipment. We request that children and pets do not enter the work area during cleaning.

Inside the building, we cover the work area and use inspection openings in a way that prevents splashes from damaging interior finishes. If the pipework is in poor condition, we will state the risk before work: a heavily corroded cast-iron pipe may burst during jetting, and the correct solution then is section replacement, not higher pressure.

The removed contents are handled according to prescribed procedures and delivered to an authorised disposal site. For commercial clients and apartment associations, we issue a proper invoice with a work description, suitable for both accounting and explanations at general meetings.

High-pressure jetting is rarely a standalone service. More often, it's part of a larger solution: first, flow is restored, then what's actually happening inside the pipe is inspected, and only then is a repair decision made.

If jetting results don't last, the next step is a CCTV inspection. If the inspection reveals a subsided or fractured section, then sewage pipe replacement comes into consideration. If the problem is a recurring blockage in one apartment, often clearing the blockage along with jetting the outlet is sufficient. If it's a localised sewage system, jetting and emptying are part of septic tank maintenance or installation.