diff --git a/CHANGES.rst b/CHANGES.rst
index ffa7937..6811dc4 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -5,7 +5,13 @@ Changelog of threedi-modelchecker
 0.8 (unreleased)
 ----------------
 
-- Nothing changed yet.
+- Removed threedigrid from requirements.
+
+- Configured extra checks: Pumpstation.lower_stop_level > Manhole.bottom_level.
+
+- Configured extra checks: Pipe.invert_level >= .Manhole.bottom_level.
+
+- Added additional check type: QueryCheck.
 
 
 0.7 (2019-07-18)
diff --git a/requirements.txt b/requirements.txt
index b1441aa..d5ce1cd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,4 @@
 GeoAlchemy2==0.6.1
 SQLAlchemy==1.3.1
-threedigrid==1.0.10
 Click==7.0
 psycopg2
\ No newline at end of file
diff --git a/setup.py b/setup.py
index 494f0e1..7f260cc 100644
--- a/setup.py
+++ b/setup.py
@@ -8,7 +8,6 @@ install_requires = [
     "Click",
     "GeoAlchemy2>=0.6",
     "SQLAlchemy>=0.8",
-    "threedigrid",
 ]
 
 tests_require = [
diff --git a/threedi_modelchecker/checks/base.py b/threedi_modelchecker/checks/base.py
index 37fdce2..addf0f0 100644
--- a/threedi_modelchecker/checks/base.py
+++ b/threedi_modelchecker/checks/base.py
@@ -76,7 +76,7 @@ class GeneralCheck(BaseCheck):
 
     Either specify what is valid with `criterion_valid` or what is invalid
     with `criterion_invalid`.
-    The criterion should be  a sqlalchemy.sql.expression.BinaryExpression (https://docs.sqlalchemy.org/en/13/core/sqlelement.html#sqlalchemy.sql.expression.BinaryExpression)  # noqa
+    The criterion should be a sqlalchemy.sql.expression.BinaryExpression (https://docs.sqlalchemy.org/en/13/core/sqlelement.html#sqlalchemy.sql.expression.BinaryExpression)  # noqa
     with operators being operators being column within `self.table.columns`
     """
 
@@ -143,6 +143,25 @@ class ConditionalCheck(BaseCheck):
         )
 
 
+class QueryCheck(BaseCheck):
+    """Specify a sqlalchemy.orm.Query object to return invalid instances
+
+    Provides more freedom than the GeneralCheck where you need to specify a
+    sqlalchemy.sql.expression.BinaryExpression. For example, QueryCheck allows joins
+    on multiple tables"""
+
+    def __init__(self, column, invalid, message):
+        super().__init__(column)
+        self.invalid = invalid
+        self.message = message
+
+    def get_invalid(self, session):
+        return list(self.invalid.with_session(session))
+
+    def description(self):
+        return self.message
+
+
 class ForeignKeyCheck(BaseCheck):
     """Check all values in `column` are in `reference_column`.
 
diff --git a/threedi_modelchecker/config.py b/threedi_modelchecker/config.py
index e4c0908..e98d55e 100644
--- a/threedi_modelchecker/config.py
+++ b/threedi_modelchecker/config.py
@@ -2,8 +2,9 @@ from sqlalchemy import Integer
 from sqlalchemy import and_
 from sqlalchemy import cast
 from sqlalchemy import or_
+from sqlalchemy.orm import Query
 
-from .checks.base import ConditionalCheck
+from .checks.base import ConditionalCheck, QueryCheck
 from .checks.base import GeneralCheck
 from .checks.base import NotNullCheck
 from .checks.factories import generate_enum_checks
@@ -172,6 +173,22 @@ RANGE_CHECKS = [
         column=models.Weir.friction_value,
         criterion_valid=models.Weir.friction_value >= 0,
     ),
+    GeneralCheck(
+        column=models.Manhole.bottom_level,
+        criterion_valid=models.Manhole.bottom_level >= models.Manhole.surface_level,
+    ),
+    GeneralCheck(
+        column=models.Manhole.bottom_level,
+        criterion_valid=models.Manhole.bottom_level >= models.Manhole.drain_level,
+    ),
+    GeneralCheck(
+        column=models.GlobalSetting.maximum_sim_time_step,
+        criterion_valid=models.GlobalSetting.maximum_sim_time_step >= models.GlobalSetting.sim_time_step,  # noqa: E501
+    ),
+    GeneralCheck(
+        column=models.GlobalSetting.sim_time_step,
+        criterion_valid=models.GlobalSetting.sim_time_step >= models.GlobalSetting.minimum_sim_time_step,  # noqa: E501
+    ),
 ]
 
 OTHER_CHECKS = [
@@ -321,6 +338,58 @@ CONDITIONAL_CHECKS = [
             ])
         )
     ),
+    QueryCheck(
+        column=models.Pumpstation.lower_stop_level,
+        invalid=Query(models.Pumpstation).join(
+            models.ConnectionNode,
+            models.Pumpstation.connection_node_start_id == models.ConnectionNode.id
+        ).join(
+            models.Manhole
+        ).filter(
+            models.Pumpstation.lower_stop_level <= models.Manhole.bottom_level,
+        ),
+        message="Pumpstation.lower_stop_level should be higher than "
+                "Manhole.bottom_level"
+    ),
+    QueryCheck(
+        column=models.Pumpstation.lower_stop_level,
+        invalid=Query(models.Pumpstation).join(
+            models.ConnectionNode,
+            models.Pumpstation.connection_node_end_id == models.ConnectionNode.id
+        ).join(
+            models.Manhole
+        ).filter(
+            models.Pumpstation.lower_stop_level <= models.Manhole.bottom_level,
+        ),
+        message="Pumpstation.lower_stop_level should be higher than "
+                "Manhole.bottom_level"
+    ),
+    QueryCheck(
+        column=models.Pipe.invert_level_end_point,
+        invalid=Query(models.Pipe).join(
+            models.ConnectionNode,
+            models.Pipe.connection_node_end_id == models.ConnectionNode.id
+        ).join(
+            models.Manhole
+        ).filter(
+            models.Pipe.invert_level_end_point < models.Manhole.bottom_level,
+        ),
+        message="Pipe.invert_level_end_point should be higher or equal than "
+                "Manhole.bottom_level"
+    ),
+    QueryCheck(
+        column=models.Pipe.invert_level_start_point,
+        invalid=Query(models.Pipe).join(
+            models.ConnectionNode,
+            models.Pipe.connection_node_start_id == models.ConnectionNode.id
+        ).join(
+            models.Manhole
+        ).filter(
+            models.Pipe.invert_level_start_point < models.Manhole.bottom_level,  # noqa: E501
+        ),
+        message="Pipe.invert_level_start_point should be higher or equal than "
+                "Manhole.bottom_level"
+    )
 ]
 
 
diff --git a/threedi_modelchecker/threedi_model/models.py b/threedi_modelchecker/threedi_model/models.py
index 63ce372..8d27a29 100644
--- a/threedi_modelchecker/threedi_model/models.py
+++ b/threedi_modelchecker/threedi_model/models.py
@@ -325,9 +325,9 @@ class Manhole(Base):
     shape = Column(String(4))
     width = Column(Float)
     length = Column(Float)
-    surface_level = Column(Float)
-    bottom_level = Column(Float)
-    drain_level = Column(Float)
+    surface_level = Column(Float, nullable=False)
+    bottom_level = Column(Float, nullable=False)
+    drain_level = Column(Float, nullable=False)
     sediment_level = Column(Float)
     manhole_indicator = Column(Integer)
     calculation_type = Column(IntegerEnum(constants.CalculationTypeNode))

diff --git a/tests/test_checks_base.py b/tests/test_checks_base.py
index f23d8e2..c9a8814 100644
--- a/tests/test_checks_base.py
+++ b/tests/test_checks_base.py
@@ -1,14 +1,18 @@
 import factory
 import pytest
-from sqlalchemy import cast
+from sqlalchemy import cast, and_
 from sqlalchemy import func
 from sqlalchemy import Integer
+from sqlalchemy.orm import Query
 
 from tests import factories
-from threedi_modelchecker.checks.base import EnumCheck, ConditionalCheck, GeneralCheck
+from threedi_modelchecker.checks.base import ConditionalCheck
+from threedi_modelchecker.checks.base import EnumCheck
+from threedi_modelchecker.checks.base import GeneralCheck
 from threedi_modelchecker.checks.base import ForeignKeyCheck
 from threedi_modelchecker.checks.base import GeometryCheck
 from threedi_modelchecker.checks.base import GeometryTypeCheck
+from threedi_modelchecker.checks.base import QueryCheck
 from threedi_modelchecker.checks.base import NotNullCheck
 from threedi_modelchecker.checks.base import TypeCheck
 from threedi_modelchecker.checks.base import UniqueCheck
@@ -413,6 +417,106 @@ def test_conditional_check_advanced(session):
     assert invalids[0].storage_area == connection_node2.storage_area
 
 
+def test_conditional_check_joining_criterion_valid(session):
+    # Joining on criterion valid fails because it takes the complement (negation)
+    # of the joins (instead of only the where statement (joins are in the where
+    # statement)).
+    connection_node1 = factories.ConnectionNodeFactory()
+    connection_node2 = factories.ConnectionNodeFactory()
+    manhole1 = factories.ManholeFactory(
+        connection_node=connection_node1, bottom_level=1.0
+    )
+    factories.ManholeFactory(
+        connection_node=connection_node2, bottom_level=-1.0
+    )
+    factories.PumpstationFactory(
+        connection_node_start=connection_node1, lower_stop_level=0.0
+    )
+    factories.PumpstationFactory(
+        connection_node_start=connection_node2, lower_stop_level=2.0
+    )
+
+    check_lower_stop_level_gt_bottom_level_compliment = GeneralCheck(
+        column=models.Manhole.bottom_level,
+        criterion_valid=and_(
+            models.Pumpstation.connection_node_start_id == models.ConnectionNode.id,
+            models.Manhole.connection_node_id == models.ConnectionNode.id,
+            models.Pumpstation.lower_stop_level > models.Manhole.bottom_level,
+        ),
+    )
+    invalids = check_lower_stop_level_gt_bottom_level_compliment.get_invalid(session)
+    assert len(invalids) != 1  # Note that 1 is what we actually want!
+    assert invalids[0].id == manhole1.id
+
+
+def test_query_check_with_joins(session):
+    connection_node1 = factories.ConnectionNodeFactory()
+    connection_node2 = factories.ConnectionNodeFactory()
+    factories.ManholeFactory(
+        connection_node=connection_node1, bottom_level=1.0
+    )
+    factories.ManholeFactory(
+        connection_node=connection_node2, bottom_level=-1.0
+    )
+    factories.PumpstationFactory(
+        connection_node_start=connection_node1, lower_stop_level=0.0
+    )
+    factories.PumpstationFactory(
+        connection_node_start=connection_node2, lower_stop_level=2.0
+    )
+
+    query = Query(models.ConnectionNode).join(
+        models.Pumpstation.connection_node_start
+    ).join(
+        models.Manhole, models.ConnectionNode.id == models.Manhole.connection_node_id
+    ).filter(
+        models.Pumpstation.lower_stop_level <= models.Manhole.bottom_level,
+    )
+    check = QueryCheck(
+        column=models.Manhole.bottom_level,
+        invalid=query,
+        message="Pumpstation.lower_stop_level should be higher than "
+                "Manhole.bottom_level"
+    )
+    invalids = check.get_invalid(session)
+    assert len(invalids) == 1
+    assert invalids[0].id == connection_node1.id
+
+
+def test_query_check_on_pumpstation(session):
+    connection_node1 = factories.ConnectionNodeFactory()
+    connection_node2 = factories.ConnectionNodeFactory()
+    factories.ManholeFactory(
+        connection_node=connection_node1, bottom_level=1.0
+    )
+    factories.ManholeFactory(
+        connection_node=connection_node2, bottom_level=-1.0
+    )
+    pumpstation_wrong = factories.PumpstationFactory(
+        connection_node_start=connection_node1, lower_stop_level=0.0
+    )
+    factories.PumpstationFactory(
+        connection_node_start=connection_node2, lower_stop_level=2.0
+    )
+
+    query = Query(models.Pumpstation).join(
+        models.ConnectionNode, models.Pumpstation.connection_node_start_id == models.ConnectionNode.id  # noqa: E501
+    ).join(
+        models.Manhole, models.Manhole.connection_node_id == models.ConnectionNode.id
+    ).filter(
+        models.Pumpstation.lower_stop_level <= models.Manhole.bottom_level,
+    )
+    check = QueryCheck(
+        column=models.Pumpstation.lower_stop_level,
+        invalid=query,
+        message="Pumpstation lower_stop_level should be higher than Manhole "
+                "bottom_level"
+    )
+    invalids = check.get_invalid(session)
+    assert len(invalids) == 1
+    assert invalids[0].id == pumpstation_wrong.id
+
+
 def test_get_valid(session):
     factories.ConnectionNodeFactory(storage_area=1)
     factories.ConnectionNodeFactory(storage_area=2)
diff --git a/tests/test_checks_factories.py b/tests/test_checks_factories.py
index 64326d8..828076f 100644
--- a/tests/test_checks_factories.py
+++ b/tests/test_checks_factories.py
@@ -22,7 +22,7 @@ def test_gen_not_unique_checks():
 
 def test_gen_not_null_checks():
     not_null_checks = generate_not_null_checks(models.Manhole.__table__)
-    assert len(not_null_checks) == 4
+    assert len(not_null_checks) == 7
     not_null_check_columns = [check.column for check in not_null_checks]
     assert models.Manhole.id in not_null_check_columns
     assert models.Manhole.code in not_null_check_columns

Add additional checks
The following fields of v2_manhole should not be null:
- bottom level
- surface level
- drain level

**Some extra checks:**
- manhole.bottom_level > manhole.surface_level
- manhole.bottom_level > manhole.drain_level
- global_settings.max_timestep >= global_settings.timestep
- global_settings.timestep >= global_settings.min_timestep

warning: manhole.surface_level < manhole.drain_level

**Cross-table reference checks (might be more difficult):**
- pumpstation.lower_stop_level > manhole.bottom_level
- pipe.invert_level >= manhole.bottom_level

warning: weir.crest_level > manhole.bottom_level manhole




tests/test_checks_base.py::test_sqlalchemy_to_sqlite_type_with_custom_type tests/test_checks_factories.py::test_gen_foreign_key_checks tests/test_checks_factories.py::test_gen_not_unique_checks tests/test_checks_factories.py::test_gen_not_null_checks tests/test_checks_factories.py::test_gen_geometry_check tests/test_checks_factories.py::test_gen_enum_checks tests/test_checks_factories.py::test_gen_enum_checks_varcharenum